481. The process involved in converting rubber into a thin sheet or coating it on fabric is called
Extrusion
Mastication
Calendering
Valcanisation
✅ The correct answer is option C.
Chemical Process MCQs
482. Litharge is
Lead oxide
Zinc oxide
Zinc sulphide
Cellulosic photographic material
✅ The correct answer is option A.
483. Fat dispersed in water is exemplified by
Colloids
Gel
Butter
Emulsion
✅ The correct answer is option C.
484. Oils and fats are converted to soap in a process called
Hydrogenation
Esterification
Saponification
None of these
✅ The correct answer is option C.
485. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Ostwald’s
Bosch
Solvay
Haber’s
✅ The correct answer is option C.
486. Chrome tanning and vegetable tanning are done for
Light & heavy leather respectively
Heavy & light leather respectively
Both light & heavy leather
Neither light nor heavy leather
✅ The correct answer is option A.
487. Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?
NH?
NaCl
CaO
Coke
✅ The correct answer is option A.
488. High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
Flocculate the impurities
Facilitate fast filtration
Both A and B
Neither A nor B
✅ The correct answer is option C.
489. For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.
(i) platinum (ii) sulphur
(i) palladium (ii) oxygen
(i) nickel (ii) sulphur
(i) nickel (ii) oxygen
✅ The correct answer is option C.
490. Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
Emulsification
Dispersion
Precipitation
Wetting
✅ The correct answer is option C.