211. Starting material for the production of styrene butadiene rubber (SBR) is
Ethyl alcohol
Ethylene
Both A & B
Neither A nor B
✅ The correct answer is option C.
Chemical Process MCQs
212. High purity nitrogen is used in
Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils
Fire fighting purposes
Both A & B
Neither A nor B
✅ The correct answer is option C.
213. Rancidity of the fatty oil can be reduced by its
Decoloration
Hydrogenation
Oxidation
Purification
✅ The correct answer is option B.
214. The major constituent of black liquor generated during paper manufacture is sodium
Sulphate
Carbonate
Hydroxide
Bi-carbonate
✅ The correct answer is option B.
215. The manufacture of Kraft pulp is done by a/an __________ process.
Alkaline
Acidic
Neutral
None of these
✅ The correct answer is option A.
216. Plasticisers are added to synthetic plastics to
Impart flexibility
Improve workability during fabrication
Develop new improved properties not present in the original resins
All of the above
✅ The correct answer is option D.
217. Permanent hardness of water is due to the presence of calcium & magnesium
Bi-carbonates
Sulphates & chlorides
Carbonate
None of these
✅ The correct answer is option B.
218. Highly porous refractory bricks are
Less susceptible to chemical attack by molten fluxes and gases etc
Very strong
Having very high thermal conductivity
None of these
✅ The correct answer is option D.
219. Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
Chromium
Arsenic
Copper
Mangnese
✅ The correct answer is option C.
220. Adipic acid is an intermediate in the manufacture of
Perspex
Nylon-66
Polystyrene
Bakelite
✅ The correct answer is option B.