Chemistry Questions and Answers

  • Why are volumes of different liquids not additive? c?
  • Why arn't alipathic amines very enantioselective in early transition metal hydroamination catalysis?
  • Why benzene is non polar?
  • Why can ethanol, a simple covalent compound, be made into fuel? (answer based on its structure and properties)
  • Why can gases be compressed easily but not liquids or solids?
  • Why cant a snowball be made if the temperature is too low?
  • Why can't common salt dissolve in alcohol?
  • Why can't we breathe pure oxygen?
  • Why can't we drink distilled water that is sold in bottles for car battery?
  • Why can't we live without sulfur?
  • Why can't we make water?
  • Why chemicals and laboratory apparatuses shouldbe handled properly?
  • Why chemicals are stored in glass or plastic containers rather than metalic ones?
  • Why conductors offer resistance?
  • Why corn pops when heated?
  • Why corrosion occured in iron but not in gold although both are transitional elements?
  • Why deep sea divers prefer helium oxygen mixture than nitrogen oxygen mixture?
  • Why deep-sea divers prefer helium oxygen mixture?
  • Why did the flavour of my chocolate change?
  • Why didn't the flames from the burning HINDENBERG put themselves out?
  • Why dipeptides do not give positive test result in Biuret test?
  • Why direct nitration of aniline yields small amounts of meta-nitroaniline but no ortho or para nitrnoaniline?
  • Why do aqueos solution of HC2H3O2 and NH4OH act weak electrolytes individually, but after they are mixed?
  • Why do aqueous solution of H2SO4 and BA(OH)2 act as strong electrolytes individually, but after they are mixed
  • Why do atoms emit a definite line spectrum of only certain energies instead of a continuous spectrum of energy
  • Why do cathode rays produce X-rays on striking with tungsten?
  • Why do chlorine bombs get very hot?
  • Why do distilled water and deionized water have essentially the same purity?
  • Why do elements within a group have similar chemical properties?
  • Why do farmers spray water on plants the night before freezing temperatures?
  • Why do formic and citric acid reaction with potassium permanganate and tthe acetic dont?
  • Why do heated soda cans get crushed when placed in cold water?
  • Why do i sweat when i drink beer?
  • Why do internal combustion engines spray liquid gas in, when vapors are the flammable state?
  • Why do ionic substances conduct charge in molten or aqueous states?
  • Why do iron rust?
  • Why do most chemical reactions occur at constant pressure?
  • Why do salts containing first group metals don't make water hard?
  • Why do salts dissolves faster in hot water?
  • Why do some liquids are soluble in water, some are insoluble/immiscible?
  • Why do strong and weak acids ionise in the same mole ratio?
  • Why do the first ionisation energies of the atoms in group 1 decrease as the atomic number increases?
  • Why do the ice cubes in my refrigerator evaporate?
  • Why do tomatoes go mushy if you freeze them but bread does not?
  • Why do we find gold as an element rather than as a compound?
  • Why do we need to filter calcium hydroxide before titration?
  • Why do we rub, beat or brush the dirt in cloth while washing with detergents or soaps?
  • Why do we see fireworks then hear them pop or explode?
  • Why do you use acid in microwave digestion ? for trace metals analysis?
  • Why does 1/2 bottle of water freeze in a oblong shape instead of round like it was when put in freezer?
  • Why does a 10 deg Celsius temperature rise has a greater effect...?
  • Why does a candle light?
  • Why does benzene dont behave like an unsaturated compound even though it contains 3 alternating double bonds?
  • Why does boiling wax create a huge burst of flame when coming in contact with water?
  • Why does carbon char?
  • Why does coal continue to burn when water is applied? Why does water make bulk stored coal burn hotter?
  • Why does fireflies admit light that has no heat? in other words, "cool lights"?
  • Why does freezing water break glass-even when there room for it to expand?
  • Why does ice sink in acetone?
  • Why does iron get hot and not cold ??
  • Why does liquid crystal lose its effectiveness under exposed heat?
  • Why does my hot cup of water boil over when I put my spoon in it? It was not boiling before I put the spoon in
  • Why does NaCl dissolve in water?
  • Why does NaCl dissolve in water (in terms of entropy)?
  • Why does nitric acid stain the skin a yellow color?
  • Why does nitric acid stain your skin?
  • Why does paper crinkle when exposed to water?
  • Why does placing an air filled balloon in the freezer for a few hours cause the balloon to shrink in size?
  • Why does rustoleum cause rust? what addative will prevent the corosion?
  • Why does salt kill slugs?
  • Why does spontanious evaporation take place?
  • Why does sugar decompose under intense heat? What is the chemical explanation for this?
  • Why does super conductors carry electricity only when very cold?
  • Why does the - terminal on the lead acid battery charger always corrode?
  • Why does the addition of ammonia to Cu(NO3)2 solution cause a precipitate to form?
  • Why does the atomic mass decrease when the atomic number increases at nickel and iodine?'?
  • Why does the line spectrum of hydrogen include light of different wavelenghts?
  • Why Does The reactivity of an Alkali Metal decrease the lower down in the peroidic table it is?
  • Why does the solid state of water (ice) has a lower density and a greater volume than its liquid form?
  • Why does the temperature continually decrease as a solution freezes instead of maintaing a constant temp. as a
  • Why does this happen...?
  • Why does two ice cubes stuck together when salt is sprinkled to it?
  • Why does vinegar make steel marbles rust faster than water?
  • Why does volume not considered as an S.I. base unit?
  • Why doesn't glue stick to the inside of it's bottle?
  • Why doesn't this fermentation pathway take advantage of ATP synthesis?
  • Why doesn't water burn?
  • Why don’t CO2 and O2 need a special transport protein in order to cross the cell membrane?
  • Why during qualitative analysis of salts we call the constituents as radicals not cation and anion?
  • Why exactly does lye burn skin?
  • Why group 2metals are harder and have higher melting point than group 1 metal?
  • Why have nuclear power plants become unpopular?
  • Why helium is said to be the heaviest element?
  • Why HF is a covalent compound while elkectronegativity difference of H&F is more than 1.9?
  • Why hplc column will go bad?
  • Why human being used salt?
  • Why ideal gases have zero volume ??
  • Why in the state of Indiana do we have to take chemistry in high school?
  • Why iodine is brown in alcohol and aceton but violet in impolar solvents?
  • Why is [H3O+] squared when calculating pH of titrations?
  • Why is 1,3 cyclobutadiene not aromatic?
  • Why is an ionic compound not considered to be a molecule?
  • Why is an O - Oxygen with 3 lone pairs (6 lone oxygens) and a negitive sign, Sp2 hybridized, and not Sp3?
  • Why is C-14 dating NOT useful in determining the age of a metal artifact?
  • Why is cold water led into the bottom of the condenser and allowed to flow out from the top?
  • Why is constant weighing significant?
  • Why is electricity called juice?
  • Why is emulsifer added to the salad dressings which we buy from shops?
  • Why is ethanol an effective treatment for ethylene glycol poisoning?
  • Why is gasoline called gas when it's a liquid?
  • Why is glass considered a liquid by chemists?
  • Why is hydrogen chloride neutral in gas form and acidic in solution?
  • Why is hydrogen gas expensive to produce?
  • Why is it difficult to determine the pH of blood by using cabbage extract?
  • Why is it hard to test for the presence of of Cl in organic compounds than in inorganic compounds like HCl?
  • Why is it impoortant to choose the proper solvent for recrystallization?
  • Why is it important to use a dry and clean spatula in scooping solid chemicals from the reagent bottles?
  • Why is it impossible to create a fourth primary colour?
  • Why is it Lucas reagent is applicable only to alcohols containing 5 or less carbons.?
  • Why is it more difficult to test for presence of chloride in organic compounds than inorganic compounds?
  • Why is it more difficult to test for the presence of chlorine in organic compounds than in inorganic compounds
  • Why is it necessary for jams to have at least 65% total solids?
  • Why is it necessary to equilibrate the developing chamber before chromatography?
  • Why is it necessary to equilibrate the developing chamber before chromatography?
  • Why is it necessary to grind the sample in experimenting sublimation and melting point determination?
  • Why is it not advisable to dry the copper directly over the Bunsen Flame?
  • Why is it significant to determine moisture content in fertilizers?
  • Why is it that a number of smaples with the same formula, C8H18 can have different properties?
  • Why is it that no matter what color bubble bath you use the bubbles are always white?
  • Why is it that no matter what color bubble bath you use the bubbles are always white?
  • Why is it that water is a liquid at room temperature, yet both hydrogen and oxygen are a gas?
  • Why is it that when a hardboiled egg is left in contact with a silver spoon, a blackspot is formed?
  • Why is it that when SO3 is added to water the pH decreases?
  • Why is it that when SO3 is added to water the pH decreases?
  • Why is it the percentage abundance is the reason why there are isotopes?
  • Why is it unlikely that the atomic nucleus is involved in a chemical reaction?
  • Why is it when So3 is added to water the ph Decreases?
  • Why is laboratory apparatus needed and equipments?
  • Why is laughing gas named so?
  • Why is Lead Azide explosive?
  • Why is lithium the least reactive in the group 1metal and yet it is the strongest reducing agent?
  • Why is Mg stronger than Zn? Why is Cu stronger than Fe?
  • Why is -OH a bad leaving group?
  • Why is oxidation of alcohols faster in an acidic medium than in a basic one? Need sources too. Thanks.?
  • Why is o-xylene used as an internal standard in the infrared spectroscopy experiment.?
  • Why is plaster of paris known as plaster of "paris"?
  • Why is steam burn potentially more severe than a water burn?
  • Why is sublimation preferred over crystallization in small scale purification?
  • Why is sugar sticky?
  • Why is sulphate or chloride or nitrate called salts?
  • Why is the 3 test tubes in the same diameter doesn't have same level of water using a dropper?
  • Why is the atom Cl+ smaller than Cl-?
  • Why is the combination of ice and salt so much colder than ice alone?
  • Why is the O-H bond in water polar?
  • Why is the water molecule bent?
  • Why is there a need to maintain the temperature reading of the mixture inside the distilling flask?
  • Why is there a need to shake the clinical thermometer prior to each use?
  • Why is there no splitting for C13?
  • Why is this done with a watchglass rather than a piece of filter paper?
  • Why is tungsten used in the filament of a bulb?
  • Why is water acidic?
  • Why is water considered a polar molecule?
  • Why is water cycled around the engines of most cars, even though it can present a problem with rusting?
  • Why is water wet?
  • Why isint caffeine bound to an acid?
  • Why Isn't Hydrogen, H considered a Group 1 Element?
  • Why it would be impossible to pour a glass of water if hydrogen bonds did not exist?
  • Why matters like woods can not be liquefied?
  • Why mercury is not wet?
  • Why milk level rises while boiling?
  • Why mono-saccharides or simple sugar are sweet in taste and soluble in water but not the polysaccharides ?
  • Why normal saline PH is acidic(5.5)?
  • Why people use nitro-compound?
  • Why poly ethyl aceto acetate shows highly conductivity ?
  • Why random samples are preferred to nonrandom samples?
  • Why serine and threonine give the positive result with the Biuret Test?
  • Why should a coarse grit of sand paper be used instead of a finer ones in polishing process?
  • Why should a Magnesium ribbon be cleaned before it is burnt in air?
  • Why should Mg combine with O2?
  • Why should the cork and the glass tubing be moistened with water?
  • Why should volume readings be taken with the eye level parallel to the meniscus?
  • Why should we calibrate the burettes and get the constant weight of glasswares before doing an analysis?
  • Why sodium chloride and hydrochloric acid do not make buffer when mixed?
  • Why sometimes there is no change in pH value when produced water is aged after sampling?
  • Why the distilled water used in PH experiment had to be boiled before use?
  • Why the melting point of aluminium chloride is 177c whereas the melting point of aluminium fluoride is 1257c ?
  • Why the nitration of nitrobenzene is much slower than the nitration of toluene?
  • Why the windscreen of a car broke during a hot afternoon?
  • Why there are isotopes?
  • Why there is warning sign on the bottles of acid and bases"?
  • Why there's many Radon gas in America that it seep into personal home?
  • Why use Ringer's solution to moisten the gastrocnemius muscle?
  • Why was the aluminum soda can crushed?
  • Why water is called as universal solvent?
  • Why water not weight the same..?
  • Why water volume increases when we subjected to cooling?
  • Why we need th heat the empty crucible and cover?
  • Why we need to placing the cover completely on top of the crucible after heating?
  • Why we need to reheating and reweighing the crucible and cover?
  • Why will increasing the temperature of a reaction speed up the reaction?


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