461. Hydrazine is largely used
As a starting material for ‘hypo’
In photographic industry
As rocket fuel
In printing industry
✅ The correct answer is option C.
Chemical Process MCQs
462. The main product of high temperature carbonisation of coal is
Coke
Ammonia
Tar
Phenol
✅ The correct answer is option A.
463. Bitterns is a/an
Unsaturated fat
Starting material for the production of iodine
By-product of chlor-alkali industry
None of these
✅ The correct answer is option D.
464. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
Adjust the pH of the syrup
Remove the coloring matter from the syrup
Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
✅ The correct answer is option A.
465. Basic oxide is absent in __________ glass.
Flint
Pyrex
Quartz
All of the above
✅ The correct answer is option C.
466. Hydrogenation of oil/fat does not
Improve its resistance to rancid oxidation
Raise its melting point
Remove double bonds
None of these
✅ The correct answer is option D.
467. Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
Reduce its viscosity
Increase its viscosity
Reduce the variation in its viscosity with temperature
Increase the variation in its viscosity with temperature
✅ The correct answer is option C.
468. Use of water having dissolved oxygen in boilers promotes
Corrosion
Sequestration
Scale formation
None of these
✅ The correct answer is option A.
469. Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
✅ The correct answer is option D.
470. Which oil is preferred for paint manufacture?
Drying oil
Non-drying oil
Semi-drying oil
Saturated oil
✅ The correct answer is option A.