5351. Neoprene is a
Monomer
Synthetic rubber
Polyester
None of these
✅ The correct answer is option B.
Chemical Engineering
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5352. Vegetable oils and fats basically differ in their
Density ranges
Physical state
Chemical composition
Chemical properties
✅ The correct answer is option B.
5353. Viscose rayon is chemically
Cellulose nitrate
Regenerated cellulose nitrate
Cellulose acetate
Regenerated cellulose acetate
✅ The correct answer is option D.
5354. __________ of quicklime produces slaked lime.
Hydration
Dehydration
Hydrogenation
None of these
✅ The correct answer is option A.
5355. The function of gypsum addition during cement making is to
Increase the density of cement
Decrease the cement setting rate
Both A and B
Neither A nor B
✅ The correct answer is option B.
5356. Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
Cause cholesterol build up and blood clotting
Are prone to rancid oxidation
Always contain some amount of nickel (as their complete removal is very difficult)
Have affinity to retain harmful sulphur compounds
✅ The correct answer is option A.
5357. Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
Salt, limestone and coke or gas
Ammonia, salt and limestone
Ammonia limestone and coke
None of these
✅ The correct answer is option A.
5358. Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
✅ The correct answer is option B.
5359. High temperature carbonisation of coal produces
Inferior coke compared to low temperature carbonisation
Less of gases compared to liquid products
Larger quantity of tar compared to low temperature carbonisation
None of these
✅ The correct answer is option D.
5360. Pure rectified spirit contains about __________ percent alcohol.
45
70
95
99.5
✅ The correct answer is option C.