Chemistry Questions and Answers

  • Which solvent shoes the greatest resolution of the dyes?
  • Which species in the reaction below undergoes reduction?
  • Which state of matter has a low density and is not easily compressed?
  • Which statement about surface tension is false?
  • Which statement below is false?
  • Which statement describes a chemical property of oxygen?
  • Which statement is true if 12 mol CO and 12 mol Fe2O3 are allowed to react? 3CO + Fe2O3 -> 2FE + 3CO2?
  • Which states of matter can form solution- solid-solid, solid-liquid, gas-liquid or all of the above?
  • Which subatomic particles has almost the same mass as the proton but has a neutral charge?
  • Which substance can act like an acid in aqueous solution?
  • Which substance is an electrolyte?
  • Which surfactant is used in granulation of casting fluxes ? write to chintamanipatwardhan@rediffmail.com?
  • Which takes place at fastest rate? CH3CH2CH2Br+NaCN--CH3CH2CH2CN+NaBr? H20 ethanol aceticacid dimethylsulfoxid
  • Which three elements?
  • Which three elements?
  • Which type of bond is formed between Na and CI on the product side?
  • Which type of particle has an atomic number of -1 and a mass number of 0?
  • Which type of radioactive emission has the highest ionizing power?
  • Which type of Sodium Acetate do I want to buy for making hot ice / hot packs?
  • Which type of substance would you use as insulating material for a hot mitt?
  • Which type of waves helps skin cells produce vitamin D?
  • Which undergoes a substitution reaction with NaCN, in DMSO the fastest? 1. R-I 2. R-Br 3. R-CL 4. R-F?
  • Which value remains the same for 1 mole of any ideal gas at STP?
  • Which water oxidation or reduction formula to use?
  • Which wavelengths are absorbed by a manganese-ammonia complex?
  • Which way is the best to remove smell of the thioacetic acid from a chemical unit?
  • Which weathers more rapidly? EXFOLIATION, FROST WEDGING or HYDROLYSIS? THANK U FOR UR HELP!?
  • Which will evaporate faster with a given temperature is listed first?
  • Which will have the highest heat of combustion? 1.1-pentene 2.trans2pentene 3.cis-2-pentene 4.2-methyl2butene?
  • Which will produce more energy per gram of hydrogen?
  • Which would dissolve better in water dextrose or potassium chloride?
  • Which would have fewer electrons, an atom or its negatively charged ion?
  • Which would you rather bee?
  • While filling of electrons in lanthanum and actinium , the last electron goes to 5d and from Pr to Lu to 4f?
  • While filling of electrons in lanthanum and actinium , the last electron goes to 5d and from Pr to Lu to 4f?
  • While producing soap by cold method, how do i increase the quatity and quantity without been shrinked?
  • While treating my swimming pool i mixed Chlorine and Sodium Bisulfate, what chemical did i produce?
  • White rays from the soil.?
  • White spirits vs. methylated spirits?
  • Who came up with the saying pee-pee?
  • Who discovered amino acid Arginine and when?
  • Who discovered radoiactivity?
  • Who discovered the element Carbon, when was it dicovered?
  • Who discovered the volume of a solid using water displacement?
  • Who discovred Carbon and when?
  • Who do I get to dispose of some hazardous materials (SODIUM HYDROXIDE)?
  • Who first use the word molecule?
  • Who invented oxygen?
  • Who invented the bubble?
  • Who is responsible for the current version of the perodic table?... i get a different person everytime!?
  • Who know about this ? a multipoint percent curve?
  • Who knows fractional distillation answer this?
  • Who knows stuff about aluminium??
  • Who knows these?
  • Who like chemistry ?
  • Who loves Chemistry?
  • Who made the first liquid fueled rocket?
  • Who manufactures apatite and what for? What are the uses of mined apatite?
  • Who or what created a welfare state in argentina?
  • Who provided evidence for the existence of a nucleus in an atom?
  • Who uses a CMMS and how?
  • Who uses a titration?
  • Who was the inventor of the deep freezing process?
  • Who will be strongest acid among them HCl, H2SO4, HNO3, H2PO4 & HPO3 and why?
  • Who won 1970 Nobel Price in Chemistry?
  • Who's law says that the more pressure the more moles of gas?
  • Wht are the effects of the following on turmeric solution? 1. orange juice 2. lemon juice 3. vinegar?
  • Whtat are the elements contained in vitamins?
  • Why "gas" smells?
  • Why affect does the addition of salt to ice make?
  • Why after Critical Temperature, it is not possible to liquefy any substance ?
  • Why Alchohol Doesnt React with NaI Or KI 2 Form R-I , But Reacts with HI 2 Form R-I ??
  • Why are alcohols more soluble in water than alkanes?
  • WHY Are Alkynes more reactive than Alkanes?
  • Why are barium compounds used when making gastrointestinal x-rays, when barium compounds are toxic?
  • Why are chips bags flushed with nitrogen?
  • Why are gases passed through copper sulphate before limewater?
  • Why are Grignard reactions carried out under anhydrous conditions?
  • Why are NH3 and H2) considered to be nucleophiles?
  • Why are nickel and other metals not included on the Metal Activity Series?
  • Why are secondary carbon-hydrogen bonds weaker than primary carbon-hydrogen bonds?
  • Why are so many people confused about the difference between a hydrogen generator and a fuel cell?
  • Why are the intermolecular forces lower in gas than a solid?
  • Why are there two isomers of propyl alcohol but only one form of propane?
  • Why are we use the Ammonia-Ammonium Chloride buffer solution in Complexometric Titrations?
  • Why Are we Use The Ammonia-Ammonium Chloride Buffer Solution in Complexometric Titrations?
  • Why Are we Use The Ammonia-Ammonium Chloride Buffer Solution in Complexometric Titrations?
  • Why are we Use the Mercuric Acetate as Reagent in Non aqeous Titrations?
  • Why are you cold when you get out of the swimming pool in the summer? Chem terms please.?
  • Why are your feet cooler when you pour water on them rather than warmer?
  • Why argon is heavier than nitrogen?
  • Why arnt people more conserned about nano tech chemicals?
  • Why atoms are sphere?
  • Why Barium Titanate (BaTiO3) show the decrease in weight (accurately mass) when it was heated?
  • Why benzaldehyde does not undergoes connizaro reaction??
  • Why blue flame is hotter than yellow flame?
  • Why caffnie &benzophenone using for h.p.l.c calibration?
  • Why can a hypothesis could still be correct if an experiment says the hypothesis is wrong?
  • Why can magnesium hydroxide be described as a strong base even though it is only slightly soluble in water?
  • Why cant Fe+2 CH3COOH(VINEGER)--->Fe(CH3COO)2+H2 SOLVE ALL OUR ENERGY NEEDS?
  • Why can't halogens react together?
  • Why can't I keep liquid chlorine over the winter? It practicularly turns to water. Where did the chlorine go?
  • Why can't scientists mass-produce ozone(03) and use it to repair the ozone hole?
  • Why cant this happen?
  • Why can't urea be produced industrially from human urine ?
  • Why can't we make are own Water for use anywhere, is it not just combining H and O?.?
  • Why cant you balance a chemical equation by changing subscripts?
  • Why Ch3OH is added to C2H5 OH?
  • Why CH4 is more electronegative than O?
  • Why chemistry is named after mystery of Carbon,Hydrogen Elements?
  • Why Cl2&Br2 doesnot form complex with starch?
  • Why could contact w/ steam @ 100C produce a more severe burn on the skin than contact w/ liquid water @ same T
  • Why cracking of decane makes a large number of alkanes?
  • WHY crystallize protein???
  • Why cutting onions irritates eyes and causes tears?
  • Why cyanide is used in gold mine?
  • Why delta G at equlibrium is equal to zero?!?
  • Why diamond is rarer in nature than graphite ?
  • Why diazonium salt affected by heat?
  • Why did Mendeleev come up with periodic table of elements?
  • Why did my recrystallization of dilantin fail?
  • Why did pathology companies change from glass tubes to plastic?
  • Why did pH change different color than I expected?
  • Why did scientists stop practicing alchemy long ago?
  • Why did the carbon tetrachloride layer change color?
  • Why did the penny covered with zinc turnes into gold?
  • Why Dietheyl ether dissolvs concentrated Sulphuric acid but not in water?/?
  • Why DMF has higher boiling point than toluene?
  • Why do 50 cm^3 of water and 50 cm^3 of ethanol only result in 95 cm^3 of solution?
  • Why do alkaline metals burn when put them in water?
  • Why do all living things have to have Carbon and Water in them?
  • Why do ASA tablets have a coatingg around them?
  • Why do bubbles float?
  • Why do carbon atoms have a bonding capacity of four?
  • Why do cars rust, even with the electricity from the battery providing cathodic protection?
  • WHY do catalysts work?
  • Why do certain elments have several oxidation states?
  • Why Do certain Polyatomic Structures have the charges they do?
  • Why do chemical reactions occur?
  • Why do chemical reactions slow down when they get cold?
  • Why do chemist think the periodic table is so elegant?
  • Why do electrons flow?
  • Why do electrons keep moving around the nucleus and not away from the atom?
  • Why do halogens exist as diatomic molecules?
  • Why do ice cubes make a popping sound when in contact with warm or hot liquids?
  • Why do ice-cubes tend to have a globular white center?
  • Why do ionic compounds dissolve in water?
  • Why do ionic compounds dissolve?
  • Why do many scientists who investigate the origin of life focus on RNA chemistry?
  • Why do materials such as copper, silver, tin tend to get hot quickly when heated.?
  • Why do mentos make a diet pepsi explode?
  • Why do metals have high melting and boiling points?
  • Why do metals in same group react similarly?
  • Why do mostly metal are silver-coloured?
  • Why do people answer questions where the asker has clearly not even tried their own homework?
  • Why do people need water?
  • Why do people say organic chemistry is so hard?
  • Why do Rechargeable Batterries last Longer?
  • Why do so many people credit Albert Einstein with splitting the atom?
  • Why do some element symbols have one letter while others have two?
  • Why do some people believe in superstitions and otheres dont?
  • Why do some people get dry mouth after eating ice cream?
  • Why do some things smell and others don't? What is smell composed of?
  • Why do sugar cubes dissolve more slowly than granulated sugar?
  • Why do the melting and boiling points of the Alkali Metals (Group I) decrease as you go down the group?
  • Why do the same volumes of oil and water heat up at different rates?
  • Why do things dissolve easier when heated?
  • Why do transition metals form coloured compounds?
  • Why do turmeric stains turn red when soaked in a detergent solution?
  • Why do we need to study chemistry?
  • Why do we study chemistry?
  • Why do we use pH to express the acidity of a solution and not the molarity of [H+]?
  • Why do we use water/aqoues medium for reaction so much?
  • Why do you add acids to water and never water to acids?
  • Why do you put batteries in a freezer?
  • Why does our country use fossil fuels when we have had hydrogen technologly since the 60s...?
  • Why does a balloon shrink when it is in the freezer?
  • Why does a hair strand on a particular area or mole never seem to drop and regrow? isnt it supposed to be so?
  • Why does a jet of flammable gas at too much pressure blow out a match?
  • Why does a milkman add baking soda to his milk??
  • Why does a mixture like fudge have a higher boiling point than water?
  • Why does a mixture of hydrogen and chlorine gas stable in the dark, yet is likely to explode in sunlight?
  • Why does a napkin turn clear when water is spilled on it?
  • Why does a regular pepsi can sink in water while a diet coke can will float of both have soda in them?
  • Why does a soda pop goes flat according to le chatlier's principle?
  • Why does acetaminophen dissolve in sodium hydroxide and methanol?
  • Why does acetone get evaporated?
  • Why does acid make you trip?
  • Why does acid not cut through glass?
  • Why does adding acid to distilled water cause a more rapid change then adding acid to ocean water?
  • Why does adding the salt solution produce a different resilt from adding the sugar solution?
  • Why does aluminium not corrode, but iron does?
  • Why does an solution of Nacl in water conduct electricity but not solid Nacl (common salt)?
  • Why does an atom that gives up electrons become positively charged? What causes the positive charge?
  • Why does an egg float when its in vinegar?why does it make bubbles?
  • Why does bleach & tap water turn black?
  • Why does brass have less resistance than nichrome?
  • Why does calcium oxide react readily with carbon dioxide?
  • Why does canada use sand on the road to melt snow instaed of salt?
  • Why does carbon dioxide gas escape when a bottle of soft-drink is shaken?


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