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# Category Question Answer Correct Incorrect Shown Difficulty Quiz Bank Content Type
4555 Chemistry What is the name of the heaviest metal? Osmium 0 0 False 3 Senior Text
4554 Chemistry Which law states that matter cannot be destroyed nor created during a chemical reaction? Law of constant composition. 0 0 False 5 Senior Text
4553 Chemistry What is the formula for formaldehyde? HCOH. 0 0 False 3 Senior Text
4552 Chemistry What is formed when Copper (1) sulphate is dissolved in water? Copper +metals and copper Sulphate. 0 0 False 4 Senior Text
4551 Chemistry Arrange in order of deceasing reactivity gold, lead, silver? lead silver gold 0 0 False 4 Senior Text
4550 Chemistry What is the chemical formual for chloroform? CHCL3. 0 0 False 3 Senior Text
4549 Chemistry Give the chemical formula for Ethanol? C2H5OH 0 0 False 3 Senior Text
4548 Chemistry What is the chemical formula for Asetic acid? CH3COOH. 0 0 False 3 Senior Text
4547 Chemistry What is formed when sulphur trioxide dissolves in water? Sulphuric Acid. 0 0 False 3 Senior Text
4546 Chemistry Give the formula for the electrolyte in a dry cell NH4 Cl 0 0 False 3 Senior Text
4545 Chemistry Give the main calcium salt in bone Ca3(PO4)2 (Calcium phosphate) 0 0 False 3 Senior Text
4544 Chemistry What is the formula for sulphur monochloride S2 CL2 0 0 False 3 Senior Text
4543 Chemistry what is the formula for Turpentine C10 H16 0 0 False 3 Senior Text
4542 Chemistry What is the chemical formula for tartaric acid C4 H6 O6 0 0 False 3 Senior Text
4541 Chemistry what is the formula of potassium hexacyonoferrate (iii) K3 Fe CN6 0 0 False 3 Senior Text
4540 Chemistry what is the formula of potassium hexacyonoferrate (ii) K4 Fe CN6 0 0 False 3 Senior Text
4539 Chemistry what is the chemical formula for the epsom salt MgSO4.7H2O 0 0 False 3 Senior Text
4538 Chemistry What is the chemical formula for potassium chromate (vi) K2CrO4 0 0 False 3 Senior Text
4537 Chemistry When Copper metal reacts with Sulphuric acid what products are formed Copper Sulphate and hydrogen gas 0 0 False 4 Senior Text
4536 Chemistry what is the empirical formula steric acid C9H18O 0 0 False 3 Senior Text
4535 Chemistry Is the oxide of aluminium, acidic basic or amphoteric? amphoteric 0 0 False 3 Senior Text
4534 Chemistry How many electrons are on the valence shell of nitrogen? 5 0 0 False 3 Senior Text
4533 Chemistry what is the common name for name for silicon oxide sand 0 0 False 3 Senior Text
4532 Chemistry when red lead is heated, what is formed lead (11) oxide and O2 0 0 False 3 Senior Text
4531 Chemistry Formed, Fe reacts with H2O in the presence of air ruet, iron (11) oxide 0 0 False 3 Senior Text
4530 Chemistry what is the formula for Ammonia NH3 0 0 False 2 Senior Text
4529 Chemistry water containing dissolved salts which form a precipitate with soap is called? hard water 0 0 False 4 Senior Text
4528 Chemistry what is another name for the atomic number of an element proton number 0 0 False 3 Senior Text
4527 Chemistry what is the outer occupied shell of electrons of an atom called? valence 0 0 False 4 Senior Text
4526 Chemistry what is the atomic number of silver 47 0 0 False 3 Senior Text
4525 Chemistry what is the atomic number of zinc 30 0 0 False 2 Senior Text
4524 Chemistry which has a greater density gold or mercury? gold 0 0 False 3 Senior Text
4523 Chemistry what is the name of the substance present at the beginning of a chemical reaction reactants/substrates 0 0 False 5 Senior Text
4522 Chemistry What is the electronic configuration of sodium? 2.8.1 0 0 False 3 Senior Text
4521 Chemistry What is the electronic configuration of potassium? 2,8,8,1 0 0 False 3 Senior Text
4520 Chemistry What is the typical value of the diameter of an atom in m 10ˉ¹º 0 0 False 4 Senior Text
4519 Chemistry O²ˉ has how many protons & elcetrons respectively 8ps, 10e 0 0 False 3 Senior Text
4518 Chemistry What is the 2nd most abundant element on the earth's crust? silicon 0 0 False 4 Senior Text
4517 Chemistry What is the alternate name for nucleon number of an atom? mass number 0 0 False 4 Senior Text
4516 Chemistry What name is given to positively charged ions? cations, (negatively charged, anions) 0 0 False 3 Senior Text
4515 Chemistry By what process is large molecule broken down by water during digestion? hydrolysis 0 0 False 4 Senior Text
4514 Chemistry Which element has the electronic configuration 2.8.6? sulphur 0 0 False 3 Senior Text
4513 Chemistry which element has the electronic configuration 2,8,8? argon 0 0 False 3 Senior Text
4512 Chemistry What is the relative charge on an electron -1 0 0 False 3 Senior Text
4511 Chemistry What is the relative mass of a proton 1 0 0 False 3 Senior Text
4510 Chemistry Nitrogen & oxygen are both produce commercially by the fractional distillation of what? liquid air 0 0 False 5 Senior Text
4509 Chemistry which special case of a colloidal system consisting of two immiscible liquids in phases? emulsion 0 0 False 5 Senior Text
4508 Chemistry What term denotes the direct conversion of a solid to a vapour on heating? sublimation 0 0 False 4 Senior Text
4507 Chemistry What is the scientific name for table sugar? glucose 0 0 False 3 Senior Text
4506 Chemistry What similar about liquid components to be separated during fractional distillation they have different boiling points 0 0 False 5 Senior Text
4505 Chemistry what is formed when solute particles are mixed but is not dissolve in the solvent? suspension 0 0 False 5 Senior Text
4504 Chemistry What term is used for a mixture with uniform composition? homogenous 0 0 False 4 Senior Text
4503 Chemistry Is powdered chalk in water an example of an emulsion or suspension? suspension 0 0 False 4 Senior Text
4502 Chemistry What type of distillation is used to separate components of two miscible liquids? fractional 0 0 False 5 Senior Text
4501 Chemistry what is defined by its mass per unit volume density 0 0 False 3 Senior Text
4500 Chemistry If a solution of fat and alcohol is added to water, what will happen to the colour of the water? it will look milky 0 0 False 5 Senior Text
4499 Chemistry Name one of the 2 main types of semiconductor chips used in most computers? Metal oxide Semiconductor or bipolar semiconductor 0 0 False 4 Senior Text
4498 Chemistry What is the atomic number of actinium? 89 0 0 False 3 Senior Text
4497 Chemistry Why is benedicts solution blue? It has copper salts. 0 0 False 2 Senior Text
4496 Chemistry Name the soluble sulphates that are used as a fertilizer? Potassium Sulphate/Ammonium Sulphate 0 0 False 4 Senior Text
4495 Chemistry Name one of the three soluble carbonates sodium, potassium or ammonium carbonate 0 0 False 3 Senior Text
4494 Chemistry What is the formula for lead (2) bromide? PbBr2 0 0 False 3 Senior Text
4493 Chemistry In a solution what name is given to the substance that is Dissolved? solute 0 0 False 4 Senior Text
4492 Chemistry What is the alternate name for ethoxy ethane? ether 0 0 False 3 Senior Text
4491 Chemistry What is the alternate name of "propanone"? acetone 0 0 False 3 Senior Text
4490 Chemistry C10 H22 is the formula for which organic compound? Decane 0 0 False 3 Senior Text
4489 Chemistry what is the chemical formula for the brilliant blue gemstone commonly called zircon Zr Si O4 0 0 False 5 Senior Text
4488 Chemistry What is the symbol for the element “Holmium” Ho 0 0 False 3 Senior Text
4487 Chemistry Which metal has an ore known as “stibnite” Antimony 0 0 False 3 Senior Text
4486 Chemistry This is the increase in the rate of a reaction caused by a catalyst Catalysis 0 0 False 4 Senior Text
4485 Chemistry What name is given to a mixture of liquids that has a boiling point which does not change during distillation Azeotropic Mixture 0 0 False 6 Senior Text
4484 Chemistry Which cation gives a deep blue solution with excess aqueous ammonia solution Cu 2+ ions 0 0 False 4 Senior Text
4483 Chemistry What is the geneal formula for rust Fe2O3.xH2O 0 0 False 3 Senior Text
4482 Chemistry Which two radio active elements make up Pitchblende (UO2) Uranium and radium 0 0 False 4 Senior Text
4481 Chemistry This gas is used in flash tubes and can provide an extreamly high intensity Xenon 0 0 False 4 Senior Text
4480 Chemistry What is the formula for salt peter? KNO3 0 0 False 3 Senior Text
4479 Chemistry What is the colour of acid on blue litmus? Red 0 0 False 3 Senior Text
4478 Chemistry Name the chief ore of lead Gallena 0 0 False 2 Senior Text
4477 Chemistry What is the formula for Prussic acid (hydrogen cyanide) HCN 0 0 False 3 Senior Text
4476 Chemistry Who first measured the charge of an electron Robert Millikan 0 0 False 3 Senior Text
4475 Chemistry Nichrome is an alloy of which to metals? Nickel and Chromium 0 0 False 3 Senior Text
4474 Chemistry What is the chemical formula for deisel? C14 H30 0 0 False 3 Senior Text
4473 Chemistry Carbon react with steam to form what Carbon monoxide and hydrogen 0 0 False 3 Senior Text
4472 Chemistry Alkanes react with oxygen to form carbon dioxide and what? Water 0 0 False 4 Senior Text
4471 Chemistry This is the freezing and refreezing of a substance uder different temperature and pressure Regelation 0 0 False 5 Senior Text
4470 Chemistry What is the chemical name for the black powder in a dry cell? Magnesium Dioxide 0 0 False 4 Senior Text
4469 Chemistry This is a naturally occuring alloy of silver and gold Electrum 0 0 False 3 Senior Text
4468 Chemistry Who first isolated aluminium? Hans christian Orsted 0 0 False 2 Senior Text
4467 Chemistry What is the sublimation temperature of solid carbon dioxde? minus 78.5 degree celcius 0 0 False 4 Senior Text
4466 Chemistry What is the chemical formula for potassium Dichromate? K2Cr207 0 0 False 3 Senior Text
4465 Chemistry Give the chemical name of Pyrolucite? Manganese Dioxide (Mn O2) 0 0 False 3 Senior Text
4464 Chemistry What is the chemical name of Kieserite Magnesium Sulphate 0 0 False 3 Senior Text
4463 Chemistry What is the chemical name of crocus powder Ferric Oxide (Fe2 O3) 0 0 False 3 Senior Text
4462 Chemistry What is the chemical name of Emery powder Alumunium Oxide (Al2 O3) 0 0 False 3 Senior Text
4461 Chemistry Give the chemical formula of the compund Blue salts? NiSO4 0 0 False 3 Senior Text
4460 Chemistry When water is added to calcium carbide ethyne is produced give the full chemical equation of the reaction Ca2C + H2O = C2H2 + CO2 0 0 False 6 Senior Text
4459 Chemistry Who discovered that hydrogen is present in all acids Humphrey Davy 0 0 False 3 Senior Text
4458 Chemistry What is the half life of plutonium 24,000 yrs 0 0 False 3 Senior Text
4457 Chemistry What is the formula for potassium manganate KMnO4 0 0 False 3 Senior Text
4456 Chemistry Synthetic detergent are the sodium salts of which family of acids Sulphonic 0 0 True 4 Senior Text
4455 Chemistry Soap is made of sodium, potassium and which acid Carbolic acid 0 0 False 3 Senior Text
4454 Chemistry What is the formula for cryolite Na3ALF6 0 0 False 2 Senior Text
4453 Chemistry Which chemical is used as a flux in the smelting of alumnium Cryolite 0 0 False 4 Senior Text
4452 Chemistry 121.75 is the relative atomic mass of which element antimony 0 0 False 3 Senior Text
4451 Chemistry Which Geman chemist studied the extraction of cold tar derivative August William Von Hoffman 0 0 False 4 Senior Text
4450 Chemistry What is the main explosive in dynamite Nitro Glycerine 0 0 False 3 Senior Text
4449 Chemistry Who won the nobel prize for chemistry in 1974 Paul Flory 0 0 False 3 Senior Text
4448 Chemistry What name is given to a pair of electrons in the out shell of an atom that does not take part in a chemical bond Lone Pair 0 0 False 6 Senior Text
4447 Chemistry what is the formua for Marcasite FeS2 0 0 False 2 Senior Text
4446 Chemistry what is the formula for Red Lead Pb3 O4 0 0 False 2 Senior Text
4445 Chemistry Give the formula for Andalusite Al2 Si O5 0 0 False 2 Senior Text
4444 Chemistry give the formula for Periodic acid H5IO6 0 0 False 3 Senior Text
4443 Chemistry This describes a substance that absorbs water from air? hydroscopic 0 0 False 3 Senior Text
4442 Chemistry are KI and Na2S203 reducing or oxidising agents? reducing 0 0 False 3 Senior Text
4441 Chemistry what is the main element in the alloy Invar iron 0 0 False 3 Senior Text
4440 Chemistry In what group is Caesium one 0 0 False 2 Senior Text
4439 Chemistry What is the si unit for luminous energy Lumen second 0 0 False 3 Senior Text
4438 Chemistry whats the chemical name of the compound with formula H2 Cr O4? Chromic Acid 0 0 False 4 Senior Text
4437 Chemistry what is the chemical name of the compound with formula HOCl? Hypochlorous Acid 0 0 False 4 Senior Text
4436 Chemistry What name is given to a solution where water is the solvent? Aqueous 0 0 False 4 Senior Text
4435 Chemistry What name is given to a substance that absorbs moisture from the environment? Hygroscopic 0 0 False 4 Senior Text
4434 Chemistry What does IUPAC stand for? International Union of Pure and Applied Chemistry 0 0 False 2 Senior Text
4433 Chemistry What is the chemical name for Fluorspar? Calcium Fluoride 0 0 False 3 Senior Text
4432 Chemistry What is the chemical name for Heavy Spar? Barium Sulphate 0 0 False 3 Senior Text
4431 Chemistry Which element got its name from the latin Baris Barium 0 0 False 3 Senior Text
4430 Chemistry Which group of the periodic table is cobalt Group 9 0 0 False 3 Senior Text
4429 Chemistry Which group of the periodic table is chromium? Group 6 0 0 False 3 Senior Text
4428 Chemistry Which two metals make up monds metal Nickel & Copper 0 0 False 3 Senior Text
4427 Chemistry What is the main element in monds metal? 0 0 False 3 Senior Text
4426 Chemistry What is the formula for Terpentine C10H16 0 0 False 3 Senior Text
4425 Chemistry Give the chemical name for fools gold Iron Pyrite 0 0 False 3 Senior Text
4424 Chemistry What is the formula for Ethanoic acid CH2COOH 0 0 False 3 Senior Text
4423 Chemistry What is the imperical formula for Methanoic acid CH2O2 0 0 False 3 Senior Text
4422 Chemistry What is formed when hydrochloric acid reacts with lead? Nothing happens 0 0 False 3 Senior Text
4421 Chemistry Who won the nobel prize for chemistry I 1903? Svante Renious 0 0 False 3 Senior Text
4420 Chemistry Who won the nobel prize for chemistry in 1911? Marie Curie 0 0 False 3 Senior Text
4419 Chemistry Give the formula for the main constituent of Saphire AL2O3 0 0 False 3 Senior Text
4418 Chemistry How many elements are there in period one of the peridic table 2 0 0 False 4 Senior Text
4417 Chemistry This is the amount of light radiated by one candela Lumen 0 0 False 3 Senior Text
4416 Chemistry Give the chemical name of telflon Polytetrafluoroethene 0 0 False 2 Senior Text
4415 Chemistry What is the formula for iodic acid HIO3 0 0 False 3 Senior Text
4414 Chemistry What is the formula for phosphorous 3 oxide P4 O6 0 0 False 3 Senior Text
4413 Chemistry True or false Phosphoric 3 acid and Nitric 3 acid are both weak acids TRUE 0 0 False 4 Senior Text
4412 Chemistry True or false Phosphoric 5 acid and Nitric 5 acid are both strong acids TRUE 0 0 False 4 Senior Text
4411 Chemistry What is the formula for siderite FeCO3 0 0 False 2 Senior Text
4410 Chemistry What is the formula for Pyrite / iron pyrite / fools' gold FeS2 0 0 False 4 Senior Text
4409 Chemistry What is the formula for Aluminium trimethyl AL(CH3)3 0 0 False 3 Senior Text
4408 Chemistry Name the elementary particle with a zero charge and a mass too close to zero to be measure Neutrino 0 0 False 5 Senior Text
4407 Chemistry The mass of a proton is how much greater than that of an electron 1836 times 0 0 False 4 Senior Text
4406 Chemistry What is the chemical formula for Sodium Aluminium fluoride? (cryolite) Na3ALF6 0 0 False 4 Senior Text
4405 Chemistry What is the formula for Sodium Chromate? Na2CrO4 0 0 False 3 Senior Text
4404 Chemistry What is the formula for Boron Nitride? BN 0 0 False 3 Senior Text
4403 Chemistry What is the formula for Hydrazine? N2H4 0 0 False 3 Senior Text
4402 Chemistry Give the chemical name for heavy water? Deuterium Oxide 0 0 False 3 Senior Text
4401 Chemistry This acid was first extracted from seaweed name it? Glutamic acid 0 0 False 3 Senior Text
4400 Chemistry What is the alternate name of beryllium in reference to glucose? Glucinium 0 0 False 4 Senior Text
4399 Chemistry Al2(O3)2SiO3.2H2O is the chemical formula for what? aluminium silicate 0 0 False 3 Senior Text
4398 Chemistry Arrange in order of increasing electrical conductivity? Al, Au, Cu 0 0 False 3 Senior Text
4397 Chemistry What is the formula of Calamine? ZnCO3 0 0 False 2 Senior Text
4396 Chemistry Which metal has the highest thermal conductivity? Silver 0 0 False 3 Senior Text
4395 Chemistry What’s the general name for Silicon Carbide abrasives? Carborundum 0 0 False 3 Senior Text
4394 Chemistry What’s the formula for Magnesium Nitrate? Mg (NO3)2 0 0 False 3 Senior Text
4393 Chemistry What’s the name of the principal ore of Antimony with formula Sb2S3? Stibnite 0 0 False 4 Senior Text
4392 Chemistry Which two acids compose Aqua Regia? Nitric Acid and Hydrochloric Acid 0 0 False 3 Senior Text
4391 Chemistry This is the branch of chemistry which deals with the physical properties of chemicals? Physical Chemistry 0 0 False 5 Senior Text
4390 Chemistry Name the dye that is obtained from various lichens? Litmus 0 0 False 3 Senior Text
4389 Chemistry What name is given to the liquid form of butane and pentane produced by distillation of petroleum during oil refinery which is widely used for cooking? LPG 0 0 False 8 Senior Text
4388 Chemistry What device is used to get the exact masses of chemical compounds? Mass Spectrometer 0 0 False 4 Senior Text
4387 Chemistry Which three metals make up the alloy German silver? Nickel, Copper, & Zinc 0 0 False 3 Senior Text
4386 Chemistry What is the colour of pure copper? Orange pink 0 0 False 3 Senior Text
4385 Chemistry Two main metals in Monz Metal? Copper & Zinc 0 0 False 2 Senior Text
4384 Chemistry P total = P1+P2+P3 is a statement of which law? Dalton’s Law 0 0 False 3 Senior Text
4383 Chemistry What is formed by the oxidation of primary alcohols? Aldehyde 0 0 False 3 Senior Text
4382 Chemistry This is the speed of an object relative to the speed of sound under the same temperature and pressure? Mac Number 0 0 False 6 Senior Text
4381 Chemistry Wich element is mostly used as a moderator in Nuclear reactors? Carbon 0 0 False 4 Senior Text
4380 Chemistry What is the chemical Aquafortis? nitric acid. 0 0 False 2 Senior Text
4379 Chemistry What is the formula for Ethyl alcohol C2 H5 OH 0 0 False 3 Senior Text
4378 Chemistry Which metal is used in the manufactor of tetra ethyl lead Sodium 0 0 False 4 Senior Text
4377 Chemistry What is the chemical name for Epsom Salt? Magnesium Sulphate heptahydrate (7H2O) 0 0 False 5 Senior Text
4376 Chemistry What is the chemical name for Borax? Sodium Tertaborate decahydrate (10 H2O) 0 0 False 3 Senior Text
4375 Chemistry what is the atomic number of vanadium 23-Jan 0 0 False 3 Senior Text
4374 Chemistry name the type of reaction in which heat is absorbed endothermic 0 0 False 3 Senior Text
4373 Chemistry when mercury oxide is heated what is formed mercury and oxygen 0 0 False 3 Senior Text
4372 Chemistry What is the chemical name for plaster of paris calicium sulphate 0 0 False 3 Senior Text
4371 Chemistry What is the chemical name for baking soda sodium bicarbonate 0 0 False 3 Senior Text
4370 Chemistry What is formed when Calcium reacts with chlorine gas Calcium Chloride 0 0 False 3 Senior Text
4369 Chemistry What is the colour of Cr2O7²ˉ (ag) orange 0 0 False 3 Senior Text
4368 Chemistry How many neutrons does the chlorine -37 isotope has 20 0 0 False 3 Senior Text
4367 Chemistry how many electrons does a chlorine - 35 isotope contain 17 0 0 False 3 Senior Text
4366 Chemistry an atom with two electron shell can accommodate how many electrons 10 0 0 False 4 Senior Text
4365 Chemistry an atom with one electron shell can accommodate how many electrons two 0 0 False 4 Senior Text
4364 Chemistry Which gas is formed when iron reacts with dilute Hydrochloric acid hydrogen 0 0 False 4 Senior Text
4363 Chemistry Formed, Fe reacts with H2O in the presence of air rust, iron (11) oxide 0 0 True 3 Senior Text
4362 Chemistry In a solution what name is given to a substance that does the dissolving solvent 0 0 False 4 Senior Text
4361 Chemistry What name is given to the group of metals occurring between Group 2 & 3 of the periodic table transition elements 0 0 False 5 Senior Text
4360 Chemistry by what process is suspended solids separated from a liquid filtration 0 0 False 4 Senior Text
4359 Chemistry what term is used for the conversion of a solid to a vapour on heating sublimation 0 0 True 4 Senior Text
4358 Chemistry T/F lead is soluble in Nitrice acid T 0 0 False 3 Senior Text
4357 Chemistry T/F all nitrates are soluble in Water T 0 0 False 3 Senior Text
4356 Chemistry What is the formula for the salt of Magnesium and hydrogen chloride MgCl2 0 0 False 4 Senior Text
4355 Chemistry When Mg reacts with cold water, what is the formula of the solution formed Mg(OH)2 0 0 False 4 Senior Text
4354 Chemistry what is the electronic configuration of barium 2.8.18.18.8.2 0 0 False 3 Senior Text
4353 Chemistry who discovered the Nobel gases William Ramsay 0 0 False 2 Senior Text
4352 Chemistry what is the maximum positive oxidation state of strontium plus 2 0 0 False 4 Senior Text
4351 Chemistry what is the formula for lead (11) oxide PbO 0 0 False 3 Senior Text
4350 Chemistry what is the main element in toothpaste which prevents decay flourine 0 0 False 4 Senior Text
4349 Chemistry what is the formula for lead (11) nitrate Pb(N03)2 0 0 False 3 Senior Text
4348 Chemistry Collective name, elements in Group V11 of the periodic table Halogens 0 0 False 4 Senior Text
4347 Chemistry What is the Collective name for elements in Group 1 of the periodic table Alkali metals 0 0 False 4 Senior Text
4346 Chemistry What is the maximum negative oxidation state of chlorine -7 0 0 False 3 Senior Text
4345 Chemistry Give the main reason why atomic radius decreases across the periodic table greater attraction of nucleus for electrons in surrounding orbitals 0 0 False 4 Senior Text
4344 Chemistry what is the symbol for iron Fe 0 0 False 2 Senior Text
4343 Chemistry what is the irreversible decomposition of a chemical compound as a result of the absorption of light photolysis 0 0 False 5 Senior Text
4342 Chemistry what is the symbol for hydrogen H 0 0 False 2 Senior Text
4341 Chemistry what is the formular for hydrogen chloride HCl 0 0 False 3 Senior Text
4340 Chemistry what is the formula for Ammonia NH3 , ammonium, NH4 0 0 False 2 Senior Text
4339 Chemistry Which group of the periodic table is Magnesium & Calcium 2 0 0 False 3 Senior Text
4338 Chemistry Which group of the periodic table is chlorine & bromine 7 0 0 False 3 Senior Text
4337 Chemistry What is the common name of the drug MDMA ecstasy 0 0 False 3 Senior Text
4336 Chemistry What is the Common name of the drug PCP angel dust 0 0 False 3 Senior Text
4335 Chemistry What name is given to elements which make up Group 8 nobel gases 0 0 False 3 Senior Text
4334 Chemistry This is a measure of acid or alkaline in a solution pH 0 0 False 3 Senior Text
4333 Chemistry In which group of the periodic table is boron 3 0 0 False 3 Senior Text
4332 Chemistry in which group of periodic table is the lithium one 0 0 False 3 Senior Text
4331 Chemistry which metal is the most malleable of them all Gold 0 0 False 3 Senior Text
4330 Chemistry what terms defines the ease with which metals can be beaten into shape malleability 0 0 False 4 Senior Text
4329 Chemistry What is the charge of the nitride ion -3 0 0 False 3 Senior Text
4328 Chemistry What is the charge of the carbonate ion -2 0 0 False 3 Senior Text
4327 Chemistry when zinc oxide is heated what is the colour change from white to yellow 0 0 False 3 Senior Text
4326 Chemistry By what process is alcohol and water separated fractional distillation 0 0 False 3 Senior Text
4325 Chemistry what is the symbol for Xenon Xe 0 0 False 2 Senior Text
4324 Chemistry what is the symbol for the element aluminium Aℓ 0 0 False 3 Senior Text
4323 Chemistry in which group of the periodic table is lithium 1 0 0 False 3 Senior Text
4322 Chemistry In which group of the periodic table is Helium 8 0 0 False 3 Senior Text
4321 Chemistry What is the atomic number of Iron 26 0 0 False 2 Senior Text
4320 Chemistry What is the atomic number of Zinc 30 0 0 False 2 Senior Text
4319 Chemistry place the following metals in order of decreasing conductivity: silver, aluminium, copper silver, copper, aluminium 0 0 False 5 Senior Text
4318 Chemistry what is the name given to what is left behind when a substance is heated residue 0 0 False 4 Senior Text
4317 Chemistry Under the same conditions of temp. and pressure equal volumes of differrent gases has equal number of molecules, whose law is this Arogadro's 0 0 False 7 Senior Text
4316 Chemistry what is the boiling point of water 100ºC 0 0 False 3 Senior Text
4315 Chemistry what is the melting point of ice OºC 0 0 False 2 Senior Text
4314 Chemistry what is the colour of potassium dichromate solution orange 0 0 False 3 Senior Text
4313 Chemistry when copper (11) sulphate crystals are heated what is the colour change blue to white 0 0 False 4 Senior Text
4312 Chemistry the emission of a beta particle of an element results in what change in the atomic number it increases by 1 0 0 False 5 Senior Text
4311 Chemistry what is the name of the substance produced by a chemical reaction product 0 0 False 4 Senior Text
4310 Chemistry which has the greater density lead or steel lead 0 0 False 3 Senior Text
4309 Chemistry Is the volume of gas senstive to temp and pressure or not. sensitive 0 0 False 4 Senior Text
4308 Chemistry are the interparticle forces in solids- relatively strong, relatively weak or moderate relatively strong 0 0 False 5 Senior Text
4307 Chemistry mixture of sand & water - homogenous or hetergenous hetergenous 0 0 False 3 Senior Text
4306 Chemistry when lead nitrate is heated, give the name of one compound formed lead oxide or nitrogen dioxide 0 0 False 4 Senior Text
4305 Chemistry when sucrose crystals are heated, what is formed carbon and water 0 0 False 3 Senior Text
4304 Chemistry What name is given to a mixture which has the same composition all the way through out? homogenous 0 0 False 5 Senior Text
4303 Chemistry What is the chemical symbol for Iron Fe 0 0 False 3 Senior Text
4302 Chemistry What is the chemical symbol for aluminum? Al 0 0 False 3 Senior Text
4301 Chemistry when molten lead bromide is decomposed by electric current, what is formed lead metal & bromine gas 0 0 False 4 Senior Text
4300 Chemistry When molten sodium chloride is decomposed by an electric current, what is formed sodium metal and chlorine gas 0 0 False 5 Senior Text
4299 Chemistry Colour of lead (ii) oxide yellow 0 0 False 2 Senior Text
4298 Chemistry Colour of lead (ii) nitrate white 0 0 False 2 Senior Text
4297 Chemistry By what process is liquid and gases spread out and mix intimately diffusion 0 0 False 4 Senior Text
4296 Chemistry During melting, does the temperature increase, decrease or remain constant remain constant 0 0 False 4 Senior Text
4295 Chemistry C10 H22 is the formula for Decane 0 0 False 2 Senior Text
4294 Chemistry Which acid is obtained from the action of sulphuric acid on potassium nitrate? nitric acid. 0 0 False 4 Senior Text
4293 Chemistry Fluorine, chlorine, bromine and iodine are four of the noble gases what is the fifth? Astatine. 0 0 False 5 Senior Text
4292 Chemistry When calcium oxide reacts with water what is the formula for the products formed? Ca(OH)2 0 0 False 5 Senior Text
4291 Chemistry When calcium reacts with water what is the formula for the products formed? Ca(OH)2 + H2 0 0 False 4 Senior Text
4290 Chemistry What is the chemical formula for potassium Chlorate? KClO3. 0 0 False 3 Senior Text
4289 Chemistry What is the formula for anaesthetic ether? CH2CH2OCH3. 0 0 False 3 Senior Text
4288 Chemistry What name is given to a solution where water is the solvent? Aqueous. 0 0 False 4 Senior Text
4287 Chemistry What name is given to a substance that absorbs moisture from the environment? Veheiscent. 0 0 False 4 Senior Text
4286 Chemistry What does IUPAC stand for? International Union of Pure and Applied Chemistry. 0 0 False 2 Senior Text
4285 Chemistry What is the chemical name for Fluorspar? Calcium Fluoride. 0 0 False 3 Senior Text
4284 Chemistry What is the chemical name for Heavy Spar? Barium Sulphate. 0 0 False 3 Senior Text
4283 Chemistry Rg is the symbol for which chemical element? Rontgenium 0 0 False 3 Senior Text
4282 Chemistry What is the old name for potassium? Kalium 0 0 False 3 Senior Text
4281 Chemistry True/False, the solubility of salts decrease when temperature increase TRUE 0 0 False 4 Senior Text
4280 Chemistry What is the formula for Methanol CH3OH 0 0 False 2 Senior Text
4279 Chemistry What is the formula for silver sulfide Ag2S 0 0 False 3 Senior Text
4278 Chemistry Who discovered the element Uranus William Hershell 0 0 False 2 Senior Text
4277 Chemistry What is the formula for ethanoic acid? CH3COOH. 0 0 False 3 Senior Text
4276 Chemistry What is the chemical Aquafortis? nitric acid. (HNO3) 0 0 False 2 Senior Text
4275 Chemistry What is the chemical name for alumina? Aluminium Oxide. 0 0 False 3 Senior Text
4274 Chemistry What is the atomic number of the element osmium? 76 0 0 False 3 Senior Text
4273 Chemistry What is the formula for ferric oxide Fe2O3 0 0 False 3 Senior Text
4272 Chemistry What is the formula for calcium carbide CaC2 0 0 False 3 Senior Text
4271 Chemistry What is formed when zinc hydroxide react hydrogen chloride Zinc chloride and water 0 0 False 4 Senior Text
4270 Chemistry What is formed when copper (2) sulphate react with sodium hydroxide Sodium sulphate + Copper hydroxide 0 0 False 4 Senior Text
4269 Chemistry What is the formula for chilli salt peter NaN03 0 0 False 3 Senior Text
4268 Chemistry What name is given to the melting and refreezing of a substance under different temperatue and pressure Regelation 0 0 False 6 Senior Text
4267 Chemistry What is the chemical name of the drug PCP phencyclidine 0 0 False 3 Senior Text
4266 Chemistry Which Russian chemist devised the first periodic table of elements Dmittri Mendelev 0 0 False 4 Senior Text
4265 Chemistry To which group of the periodic table does arsenic belong Group 5 0 0 False 3 Senior Text
4264 Chemistry To which group of the periodic table does strontium belong Group 2 0 0 False 4 Senior Text
4263 Chemistry What type of isomerism are two inconvertable isomers in equilibrium Tautomerism 0 0 False 4 Senior Text
4262 Chemistry What is formed when hydrochloric acid react with lead Nothing happens 0 0 False 3 Senior Text
4261 Chemistry Which law states that "At a given temperature the rate at which a chemical reaction take place is equal to the product of the active masses of the reactants Law of mass action 0 0 False 8 Senior Text
4260 Chemistry Which group of the periodic table is antimony Group 5 0 0 False 3 Senior Text
4259 Chemistry What is the chemical name for Isopropyl alcohol Rubbing Alcohol 0 0 False 3 Senior Text
4258 Chemistry Give the formula for farmaldehyde HCOH 0 0 False 2 Senior Text
4257 Chemistry Give the formula for the electrolyte in a dry cell NH4Cl 0 0 False 3 Senior Text
4256 Chemistry Give the main calcium salt in bone Ca3(PO4)2 0 0 False 3 Senior Text
4255 Chemistry What name is given to a substance that eventually dissolve water molecules that it absorbs Deliquescent 0 0 False 5 Senior Text
4254 Chemistry What is the formula for Ethyl alcohol C2H5OH 0 0 False 3 Senior Text
4253 Chemistry Which metal is used in the manufactor of tetraethyl lead Sodium 0 0 False 3 Senior Text
4252 Chemistry What is the formula for sulphur monochloride S2CL2 0 0 False 3 Senior Text
4251 Chemistry what is the formula for Turpentine C10H16 0 0 False 3 Senior Text
4250 Chemistry which element derives its name fom the greek Kallium? Potassium 0 0 False 3 Senior Text
4249 Chemistry what is the most stable form of Radium 226 0 0 False 3 Senior Text
4248 Chemistry what name is given to the nucleus of an isotope? nucleide 0 0 False 3 Senior Text
4247 Chemistry Who discovered the element magnesium? Sir Humphrey Davey 0 0 False 3 Senior Text
4246 Chemistry What is the symbol of Strontium? S-r 0 0 False 3 Senior Text
4245 Chemistry What is the chemical name for Epsom Salt? Magnesium Sulphate heptahydrate (7H2O) (MgSO4 + 7H2O , (Hydrated Magnesium Sulfate) 0 0 False 5 Senior Text
4244 Chemistry wat are the two main colors of litmus paper? Red and blue 0 0 False 7 Senior Text
4243 Chemistry Who discovered the element radium? Marie & Piere Curie 0 0 False 3 Senior Text
4242 Chemistry What is the symbol of Zirconium? Z-r 0 0 False 2 Senior Text
4241 Chemistry What is the chemical name for Borax? (Na2B4O7·10H2O ) Sodium Tertaborate decahydrate (10 H2O) 0 0 False 3 Senior Text
4240 Chemistry What is the simplest possible alkane Methane 0 0 False 3 Senior Text
4239 Chemistry This term means the change of state when water freezes to form ice solidification 0 0 False 4 Senior Text
4238 Chemistry What is the chemical formula for tartaric acid C4H6O6 0 0 False 3 Senior Text
4237 Chemistry What is the relative atomic mass of a neutron 1.67x10*27Kg 0 0 False 3 Senior Text
4236 Chemistry What is formed when acids react with active metals salt and hydrogen 0 0 False 3 Senior Text
4235 Chemistry when the indicator phenolphthalein reacts with a base, what colour is seen pink 0 0 False 4 Senior Text
4234 Chemistry when the indicator methyl orange reacts with an acid, what colour is seen red 0 0 False 4 Senior Text
4233 Chemistry is the reaction between magnesium and cold water fast or slow slow 0 0 False 4 Senior Text
4232 Chemistry is the reaction of calcium in cold water brisk or slow brisk 0 0 False 3 Senior Text
4231 Chemistry By what process does a substance gain 1 or more electrons reduction 0 0 False 4 Senior Text
4230 Chemistry is hydrogen sulphide a common oxidizing or reducing agent reducing agent 0 0 False 4 Senior Text
4229 Chemistry mass of an electron 9.11x10ˉ³¹Kg 0 0 False 2 Senior Text
4228 Chemistry formula copper (i) oxide CU20 0 0 False 2 Senior Text
4227 Chemistry what is the oxidation state of hydrogen in ionic hydrides -1 0 0 False 4 Senior Text
4226 Chemistry wht is the maximum negative oxidation state of bromine -1 0 0 False 3 Senior Text
4225 Chemistry What is the atomic number of cobalt 27 0 0 False 3 Senior Text
4224 Chemistry what is the atomic number of vanadium 0 0 False 3 Senior Text
4223 Chemistry what is the formula of potassium hexacyonoferrate (iii) K3FeCN6 0 0 False 3 Senior Text
4222 Chemistry what is the formula of potassium hexacyonoferrate (ii) K4FeCN6 0 0 False 3 Senior Text
4221 Chemistry name the type of reaction in which heat is absorbed endstermic r xN 0 0 False 3 Senior Text
4220 Chemistry What is the melting point of chlorine gas Minus 101ºC 0 0 False 3 Senior Text
4219 Chemistry what is the amount of product formed during an incomplete reaction called actual yield 0 0 False 4 Senior Text
4218 Chemistry In chemistry what is a volumetric analysis an analysis which determines the concentration of a solution 0 0 False 3 Senior Text
4217 Chemistry what is the atomic # Nickel 28 0 0 False 2 Senior Text
4216 Chemistry what is the atomic number of titanium 22 0 0 False 3 Senior Text
4215 Chemistry What is the formula for potassium chlorate KCℓO3 0 0 False 3 Senior Text
4214 Chemistry What is the formula for potassium carbonate K2CO3 0 0 False 3 Senior Text
4213 Chemistry Appoximately what % of hydrogen is in water 11% 0 0 False 3 Senior Text
4212 Chemistry what's the simplest formula of a compound which gives the atoms in their lowest proportions called empirical formula 0 0 False 5 Senior Text
4211 Chemistry what is the ratio of the average mass of an element to 1/12 the mass of an atom of carbon -12 relative atomic mass 0 0 False 5 Senior Text
4210 Chemistry what is the chemical formula for the epsom salts MgSO4.7H2O 0 0 False 3 Senior Text
4209 Chemistry what is the chemical formula for the acid in vinegar CH3COOH 0 0 False 3 Senior Text
4208 Chemistry What is the molecular formula of benzene CH 0 0 False 3 Senior Text
4207 Chemistry What is the molecular formual of benzene C6H6 0 0 False 3 Senior Text
4206 Chemistry What is the chemical formula for potassium chromate (vi) K2CrO 0 0 False 3 Senior Text
4205 Chemistry What is the chemical symbol for the element strontium Sr 0 0 False 3 Senior Text
4204 Chemistry symbol titanium Ti 0 0 False 2 Senior Text
4203 Chemistry What is the atomic number of Mercury? 80 0 0 False 3 Senior Text
4202 Chemistry When Copper metal reacts with Sulphuric acid products are formed Copper Sulphate and hydrogen gas 0 0 False 4 Senior Text
4201 Chemistry What is the colour change when sulphur monoxide reacts with acidified potassium dichromate K2Cr2O7 orange to green 0 0 False 5 Senior Text
4200 Chemistry what is the empirical formula stearic acid C9H18O 0 0 False 3 Senior Text
4199 Chemistry What is the molecular formula for butene C4H8 0 0 False 3 Senior Text
4198 Chemistry what is the formula of the gas formed when magnesium silicate reacts with HCl(g) to form silane SiH4 0 0 False 5 Senior Text
4197 Chemistry what is the formula for lead(iv) oxide? PbO2 0 0 False 3 Senior Text
4196 Chemistry What is the electronic configuration of iodine? 2.8.18.18.7 0 0 False 3 Senior Text
4195 Chemistry What is the electronic configuration of Bromine? 2.8.18.7 0 0 False 3 Senior Text
4194 Chemistry Is the oxide of aluminium, acidic basic or amphoteric? amphotenic 0 0 False 3 Senior Text
4193 Chemistry c10h22 is the formula for Decane 0 0 False 2 Senior Text
4192 Chemistry what is the chemical formula for the brilliant blue gemstone commonly called zircon ZrSiO4 0 0 False 5 Senior Text
4191 Chemistry What two elements are present in all garnets silicon and oxygen 0 0 False 3 Senior Text
4190 Chemistry Name the element which is a gas above 196 degrees Celsius and a solid below -210 degrees Celsius Nitrogen 0 0 False 5 Senior Text
4189 Chemistry What is the symbol for the element “Homium” Ho 0 0 False 3 Senior Text
4188 Chemistry What is the symbol for the element “Lawrencium” LR 0 0 False 3 Senior Text
4187 Chemistry what are the main components of the alloy steel Carbon & iron 0 0 False 3 Senior Text
4186 Chemistry What two metals make up the alloy brass Copper & Zinc 0 0 False 3 Senior Text
4185 Chemistry What is the atomic number of Plutonium 94 0 0 False 3 Senior Text
4184 Chemistry Which chemist adapted the Haber process for the industrial production of ammonia Bosch 0 0 False 5 Senior Text
4183 Chemistry What is the symbol for the element “Antimony” Sb 0 0 False 3 Senior Text
4182 Chemistry What is the symbol for the element “Lutetium” Lu 0 0 False 3 Senior Text
4181 Chemistry What is the only magnetic isotope of Carbon Carbon-13 0 0 False 3 Senior Text
4180 Chemistry Which isotope of Carbon is the standard for the atomic mass scale Carbon-12 0 0 False 4 Senior Text
4179 Chemistry What term denotes the energy required for the separation of a formula weight of solid ions into gaseous ions Lattice energy 0 0 False 6 Senior Text
4178 Chemistry Which metal has an ore known as “stibnite” 0 0 False 3 Senior Text
4177 Chemistry What is the formual for iodic acid HiO3 0 0 True 3 Senior Text
4176 Chemistry What is the formula for phosphorous (3) oxide? P4O6 0 0 False 3 Senior Text
4175 Chemistry true or false when a hot thermometer is dipped quickly in cold water the mercurylevel rises momentarily TRUE 0 0 False 6 Senior Text
4174 Chemistry What is the formula for iron sulfide? FeS2 0 0 False 3 Senior Text
4173 Chemistry Which term describes travelling waves which are always in phase? Coherent 0 0 False 4 Senior Text
4172 Chemistry What name is give to a substance made of a single component that a definite and constant compostion? Pure Substance 0 0 False 5 Senior Text
4171 Chemistry This is the process of extracting metals which involves melting the ore? Smelting 0 0 False 4 Senior Text
4170 Chemistry Two main metals in Mondz Metal? Copper & Zinc 0 0 False 2 Senior Text
4169 Chemistry Bronze is made up of copper and tin, but what percentage is tin? 25% 0 0 False 4 Senior Text
4168 Chemistry Brass is made up of copper and zinc but what percentage is copper? 70% 0 0 False 4 Senior Text
4167 Chemistry Zeolite is the name of the large group of amorphous hydrated silicate minerals of which element? aluminium 0 0 False 5 Senior Text
4166 Chemistry What is the formula for methylamine? CH3NH2 0 0 False 3 Senior Text
4165 Chemistry What term defines a substance in which the hydrogen of an acid is replaced by a metal? salt 0 0 False 5 Senior Text
4164 Chemistry What are substances which change colour with acids known as? indicators 0 0 False 4 Senior Text
4163 Chemistry Under identical conditions of temperature and pressure equal volumes of different gasses contain equal numbers of particles is a statement of of which law? Avogadro’s Law 0 0 False 8 Senior Text
4162 Chemistry The Rashid process is used to extract which chemical? Carbolic acid, Phenol 0 0 False 3 Senior Text
4161 Chemistry Who’s law states that in a mixture of different gases, the sum of the partial pressure of all gases equals the total pressure? John Dalton 0 0 False 7 Senior Text
4160 Chemistry Which process is used to extract Hafnium? Kroll Process 0 0 False 3 Senior Text
4159 Chemistry Invar is an ore of which three metallic elements? Nickel, Carbon, Iron 0 0 False 3 Senior Text
4158 Chemistry Green nocite is an ore of which element? Cadmium 0 0 False 3 Senior Text
4157 Chemistry What name is given to the alloy of copper and nickel in equal portions? Constantan 0 0 False 4 Senior Text
4156 Chemistry Give the chemical formula for Amino Benzene? C6H5NH2 0 0 False 3 Senior Text
4155 Chemistry What is the chemical formula for frion 12? CCL2F2 0 0 False 3 Senior Text
4154 Chemistry This non metallic element widely used as control rods and also to make hard metallic alloys Boron 0 0 False 5 Senior Text
4153 Chemistry This is a semiprecious stone of quarks violet or purple in colour? Amythist 0 0 False 4 Senior Text
4152 Chemistry What name is give to substances that slows down the electrons nuclear reactor? Moderator 0 0 False 4 Senior Text
4151 Chemistry What is the relative atomic mass of silver? 107.868 0 0 False 3 Senior Text
4150 Chemistry What is the mass of gold? 197 0 0 False 2 Senior Text
4149 Chemistry This term refers to the purification of metals by electrolysis? Metallurgy 0 0 False 4 Senior Text
4148 Chemistry This term refers to the microscopic study of the structure of metals? Metallography 0 0 False 4 Senior Text
4147 Chemistry Wich element is most used as a moderator in Nuclear reactor? Carbon 0 0 False 4 Senior Text
4146 Chemistry Give the chemical formula of Sodium Benzoate? C6H5COONa C6H5COONa 0 0 False 3 Senior Text
4145 Chemistry What is the formula for sodium amide? NaNH2 0 0 False 3 Senior Text
4144 Chemistry Which element is the lightest known solid having a relative density of just 0.534? Lithium 0 0 False 5 Senior Text
4143 Chemistry What is the household name for calcium oxide? Quicklime 0 0 False 3 Senior Text
4142 Chemistry By what process are suspended solids separated from aliquid? Filtration 0 0 False 4 Senior Text
4141 Chemistry What is found in the space outside the nucleus of an atom? Electrons 0 0 False 4 Senior Text
4140 Chemistry What is the critical temperature of water? 374ºC 0 0 False 3 Senior Text
4139 Chemistry What name is given to a liquid that conducts electricity? Electrolyte 0 0 False 4 Senior Text
4138 Chemistry What term describes the process by which proteins lose their three dimensional structre? Denaturing 0 0 False 5 Senior Text
4137 Chemistry What are the electrodes of a cyclotron called? Dees 0 0 False 3 Senior Text
4136 Chemistry The emission of electron from a metal heated in a vacuum is called? Thermal 0 0 False 4 Senior Text
4135 Chemistry What term is used to describe a salt that has no water of crystallization? Anhydrous 0 0 False 4 Senior Text
4134 Chemistry What term describes a salt that loses its water of crystallization when exposed to air? Efflorescence 0 0 False 5 Senior Text
4133 Chemistry Explain how a metal can be displaced from a solution of one of its salt. By adding a more reactive element 0 0 False 4 Senior Text
4132 Chemistry What is the symbol for the element holmium? Ho 0 0 False 3 Senior Text
4131 Chemistry What is the formula of the chemical commonly known as carbolic acid? C6H5OH 0 0 False 4 Senior Text
4130 Chemistry What is the valency of the bisulphate acid radical? -1 0 0 False 3 Senior Text
4129 Chemistry What is the formula of the phenylammonium ion? C6H5NH3+ 0 0 False 3 Senior Text
4128 Chemistry What name is given to a molecule that has an unpaired electron? Free radical 0 0 False 4 Senior Text
4127 Chemistry What is formed when radon-222 emits an alpha particle? Polonium 0 0 False 3 Senior Text
4126 Chemistry What is formed when polonium-218 emits an alpha particle? Stable isotope of lead 0 0 False 4 Senior Text
4125 Chemistry What is the valence of nitrogen in hydroxylamine (NH2OH)? 1 0 0 False 4 Senior Text
4124 Chemistry What is the valency of nitrogen in hydrazine (N2H4)? 2 0 0 False 3 Senior Text
4123 Chemistry What is the full chemical formula for washing soda? Na2CO3.10H2O 0 0 False 3 Senior Text
4122 Chemistry What is the full chemical formula for Epsom salt? MgSO4.7H2O 0 0 False 3 Senior Text
4121 Chemistry What molecule is formed when a stable molecule of oxygen is subjected to ultraviolet radiation? Ozone 0 0 False 5 Senior Text
4120 Chemistry Rutile is an ore of which element? Titanium 0 0 False 3 Senior Text
4119 Chemistry What is the formula for formic acid? HCOOH 0 0 False 3 Senior Text
4118 Chemistry Who won the Novel Prize for Chemistry in 1977? Illya Priogine 0 0 False 3 Senior Text
4117 Chemistry Who won the Nobel Prize for Chemistry in 1982 for crystallography? Aaron Klug 0 0 False 4 Senior Text
4116 Chemistry In the formula V=W/Q, where V is the potential difference and Q is charge, what is W? Work done 0 0 False 5 Senior Text
4115 Chemistry In the formula E=IZ, Ohm's law for AC circuit, what does the Z represent? Impedance 0 0 False 4 Senior Text
4114 Chemistry Name the element which is a gas above -196ºC and a solid below -210ºC. Nitrogen 0 0 False 4 Senior Text
4113 Chemistry What is the formula for calcite? CaCO3 0 0 False 2 Senior Text
4112 Chemistry What is the formula for smithsonite? ZnCO3 0 0 False 3 Senior Text
4111 Chemistry Name one of the two major elements in muntz metal. Copper or zinc 0 0 False 3 Senior Text
4110 Chemistry What is the chemical formula for propene? C3H6 0 0 False 3 Senior Text
4109 Chemistry What is the chemical formula for hexane? C6H14 0 0 False 3 Senior Text
4108 Chemistry Calcium tungstate, a common ore of tungsten, has a common name. What is it? Shelite 0 0 False 4 Senior Text
4107 Chemistry Specular metal is an alloy of which two metals? Copper and tin 0 0 False 3 Senior Text
4106 Chemistry How many hydrogen atoms are there in decane? 22 0 0 False 3 Senior Text
4105 Chemistry Bronze is made up of copper and tin but approximately what percentage is tin? 35% 0 0 False 4 Senior Text
4104 Chemistry Brass is made up of copper and zinc, but approximately what percentage is copper? 70% 0 0 False 5 Senior Text
4103 Chemistry Zeolite is a collective name of a large group of amorphous hydrated silicate mineral of which element? Aluminium 0 0 False 6 Senior Text
4102 Chemistry What is the formula of methylamine? CH3NH2 0 0 False 3 Senior Text
4101 Chemistry What name is given to a substance in which the hydrogen of an acid is replaced by a metal? Salt 0 0 False 5 Senior Text
4100 Chemistry What name is given to substances which change colour with acids? Indicators 0 0 False 4 Senior Text
4099 Chemistry What is the formula for benzene? C6H6 0 0 False 2 Senior Text
4098 Chemistry What is formed when silane (SiH4) reacts with ammonia? Silicon nitride and hydrogen gas 0 0 False 3 Senior Text
4097 Chemistry When sodium stearate reacts with calcium bicarbonate, what is formed? Calcium stearate and sodium bicarbonate 0 0 False 4 Senior Text
4096 Chemistry Name two of the main elements in the alloy duralamin. Aluminum, copper, manganese and magnesium 0 0 False 3 Senior Text
4095 Chemistry Name two of the main elements in the alloy nichrome. Nickel and chromium 0 0 False 3 Senior Text
4094 Chemistry What term describes the probability pattern of an electron about the nucleus of an atom? Orbital 0 0 False 5 Senior Text
4093 Chemistry What chemical element is represented by the symbol 'Be'? Beryllium 0 0 False 3 Senior Text
4092 Chemistry Which nuclear fuel is obtained when thorium is bombarded with neutrons? Uranium 233 0 0 False 4 Senior Text
4091 Chemistry True or False. The pressure at any point in a liquid acts in one direction. FALSE 0 0 False 4 Senior Text
4090 Chemistry True or False. The pressure at any point in a liquid depends on its density. FALSE 0 0 False 4 Senior Text
4089 Chemistry What is the approximate range of beta particles in air? A few metres 0 0 False 3 Senior Text
4088 Chemistry What name is given to an electron emitted from the nucleus of a radioactive atom? Beta particle 0 0 False 5 Senior Text
4087 Chemistry What are the first four members of the alkane series? Methane, ethane, propane and butane 0 0 False 3 Senior Text
4086 Chemistry What is the general formula for alkenes? CnH2n 0 0 False 3 Senior Text
4085 Chemistry What is the formula for methanoic acid? HCOOH 0 0 False 3 Senior Text
4084 Chemistry What is the formula for sodium perchlorate? NaClO4 0 0 False 3 Senior Text
4083 Chemistry What is the oxidation state of chlorine in NaClO3? +5 0 0 False 3 Senior Text
4082 Chemistry What is the electronic configuration of barium? 2,8,18,18,8,2 0 0 False 3 Senior Text
4081 Chemistry What is the formula of lead (II) oxide? PbO 0 0 False 3 Senior Text
4080 Chemistry What is the formula for lead (II) nitrate? Pb(NO3)2 0 0 False 3 Senior Text
4079 Chemistry What is the atomic number of cobalt? 27 0 0 False 3 Senior Text
4078 Chemistry What is the atomic number of vanadium? 23 0 0 False 3 Senior Text
4077 Chemistry What is the formula for the sulphate ion? SO42- 0 0 False 3 Senior Text
4076 Chemistry What is the molecular formula for hexane? C6H14 0 0 False 3 Senior Text
4075 Chemistry What name is given to the isotope of hydrogen that has two (2) neutrons and one proton in its nucleus? Tritium 0 0 False 6 Senior Text
4074 Chemistry Strontium is the main element in celestite. What is the formula for celestite? SrSO4 0 0 False 4 Senior Text
4073 Chemistry 137.33 is the atomic mass of which element? Barium 0 0 False 3 Senior Text
4072 Chemistry What is the value of Avogadro's number? 6.022 × 1023 0 0 False 3 Senior Text
4071 Chemistry What is the value of the atmospheric pressure in newton per metre squared? 1.01 × 105 0 0 False 4 Senior Text
4070 Chemistry When lead carbonate dissolves in warm nitric acid, what is formed? Lead nitrate, carbon dioxide and water 0 0 False 4 Senior Text
4069 Chemistry In which group of the periodic taable is indium? 3 0 0 False 3 Senior Text
4068 Chemistry In which group of the periodic table is polonium? 6 0 0 False 3 Senior Text
4067 Chemistry When hydrochloric acid is added to propene, what is formed? Chloropropane 0 0 False 4 Senior Text
4066 Chemistry What are alkanes that cannot add any more hydrogen called? Saturated hydrocarbons 0 0 False 4 Senior Text
4065 Chemistry What is the common everyday term for solid crystalline water? Ice 0 0 False 4 Senior Text
4064 Chemistry What type of rocks are formed when magma cools and solidifies? Igneous 0 0 False 4 Senior Text
4063 Chemistry What is the formula of nitromethane? CH3NO2 0 0 False 3 Senior Text
4062 Chemistry What is the formula for potassium dichromate? K2Cr2O7 0 0 False 3 Senior Text
4061 Chemistry What is the valency of the carbonate radical? 2 0 0 False 3 Senior Text
4060 Chemistry What is the valency of the nitrate radical? 1 0 0 False 3 Senior Text
4059 Chemistry Casseterite is the mineral of which element? Tin (SnO2 or tinstone) 0 0 True 3 Senior Text
4058 Chemistry What is the main chemical in antifreeze? Glycol 0 0 False 3 Senior Text
4057 Chemistry What is the atomic number of ytterium? 39 0 0 False 3 Senior Text
4056 Chemistry What is the atomic number of bismuth? 83 0 0 False 3 Senior Text