Q.No. 51 - Which chemical is used for the preservation of biological specimen?
Ans - Formalin
Q.No. 52 - The alcohol which is present in the alcoholic beverages is?
Ans - Ethanol (Ethyl Alcohol)
Q.No. 53 - Which chemical is used as eyewash?
Ans - Boric Acid
Q.No. 54 - Which element is used for manufacturing computer chips, solar cells and transistors?
Ans - Silicon
Q.No. 55 - Benzodiaepine is the most commonly used?
Ans - Psychoactive drug (Sleeping pills)
Q.No. 56 - Which chemical is used for the artificial ripening of fruits?
Ans - Calcium carbide
Q.No. 57 - Which chemical is known in the names 'Sweet Air & Laughing Gas'?
Ans - Nitrous Oxide
Q.No. 58 - Who was the first to synthesize nitrous oxide
Ans - Joseph Priestly
Q.No. 59 - Which are the major geen house gases?
Ans - Carbon dioxide, nitrous oxide & methane
Q.No. 60 - Who invented the pH scale?
Ans - Soren Sorenson
Q.No. 61 - Water gas is the mixture of Hydrogen and ?
Ans - Carbon monoxide
Q.No. 62 - What is the solvent of the precious metals?
Ans - Aqua regia
Q.No. 63 - What is the chemical name of the red pigment vermilion?
Ans - Mercuric sulfide
Q.No. 64 - A molecule or icon that can react as an acid as well as a base is known as ?
Ans - Amphoteric species
Q.No. 65 - What are examples of amphoteric substances?
Ans - Zinc oxide, Aluminium hydroxide, Beryllium hydroxide and Lead oxide
Q.No. 66 - Which chemical is known as 'Salt gas'?
Ans - Hydrogen chloride
Q.No. 67 - Which chemical is also known in the names 'Mosaic gold, Stannic sulfide & Bronze powder'?
Ans - Tin sulfide
Q.No. 68 - Which metal is named after the Germanic goddess of beauty and fertility?
Ans - Vanadium
Q.No. 69 - Which chemical is used as catalyst in the production of Sulfuric acid?
Ans - Vanadium pentoxide
Q.No. 70 - Which chemical is also known in the names 'Sugar of lead, Salt of Saturn and Goulard's powder?
Ans - Lead acetate
Q.No. 71 - What is the chemical name of the semi-precious stone agate?
Ans - Silicon dixoide (Silica)
Q.No. 72 - Silicon Carbide is popularly known in the name?
Ans - Carborundum
Q.No. 73 - What is the chemical name of the 'milk of lime'?
Ans - Calcium hydroxide
Q.No. 74 - Iron ammonium sulfate is popularly known as ?
Ans - Mohr's salt
Q.No. 75 - Carbamide is widely known as?
Ans - Urea
Q.No. 76 - Which chemical is also known in the names 'Calgon, Glassy sodium & Graham's Salt'?
Ans - Sodium hexametaphosphate
Q.No. 77 - Which chemical is popularly known in the names 'Washing soda and Soda ash'?
Ans - Sodium Carbonate
Q.No. 78 - The Solvay Process or Ammonia soda process is the major industrial process for the production of ?
Ans - Soda Ash
Q.No. 79 - Amalgams are the alloys of ?
Ans - Mercury
Q.No. 80 - The alloy of Tin & Lead is known as ?
Ans - Solder
Q.No. 81 - Which combustible material is present on the tip of a safety match stick?
Ans - Antimony sulfide
Q.No. 82 - The principal ingredient of the chemicals limestone, chalk, marble and pearl is?
Ans - Calcium carbonate
Q.No. 83 - Is an example of 'Super cooled liquid'?
Ans - Glass
Q.No. 84 - Glass dissolves in _____ acid?
Ans - Hydrofluric acid
Q.No. 85 - Which is the major component of biogas?
Ans - Methane
Q.No. 86 - The chemical widely known as 'Pink gold, Red gold and Russian gold' is an alloy of?
Ans - Gold & Copper
Q.No. 87 - Which is the rarest naturally occurring element that is not a transuranic element?
Ans - Astatine
Q.No. 88 - Which gases are industrially produced by cryogenic fractional distillation of liquefied air?
Ans - Neon and Crypton
Q.No. 89 - Which metal was discovered in 1898 by Marie & Pierre Curie ?
Ans - Polonium
Q.No. 90 - Which is the densest single gas occurring naturally?
Ans - Radon
Q.No. 91 - Which is the radioactive noble gas?
Ans - Radon
Q.No. 92 - Which noble gas is found in spring waters and hot springs?
Ans - Radon
Q.No. 93 - Which radioactive gas is considered a significant contaminant that affect indoor air quality?
Ans - Radon
Q.No. 94 - Leucite is the minerals of which metal?
Ans - Rubidium
Q.No. 95 - Which is the least electronegative and the most electropositive element?
Ans - Caesium
Q.No. 96 - Which metal is widely used in the atomic clocks?
Ans - Caesium
Q.No. 97 - Which metal has the lowest hardness of all elements ?
Ans - Caesium
Q.No. 98 - Which metal is stored in vacuum sealed borosilicate glass ampoules?
Ans - Caesum
Q.No. 99 - Which is the most corrosion resistant metal?
Ans - Iridium
Q.No. 100 - Which is the densest metal?
Ans - Osmium
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