501. Flux addition during smelting of ore is done to
Remove impurities/gangue
Enhance rate of reaction
Accelerate reduction of ore
Separate slag from metal
✅ The correct answer is option A.
Chemical Process MCQs
502. Cation exchanger is regenerated usually with
NaOH
H₂SO₄
Hydrazine
Alum solution
✅ The correct answer is option B.
503. The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is
Alumina
Silica gel
Platinum
Nickel
✅ The correct answer is option A.
504. Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
Na₂CO₃
NaHCO₃
H₂
None of these
✅ The correct answer is option C.
505. Styrene (a monomer for the production of polystyrene) is commercially produced by
Catalytic dehydrogenation of ethyl benzene
Dehydration of ethyl alcohol followed by hydrogenation
Reacting ethylene oxide with acetal-dehyde
Fermentation of starch
✅ The correct answer is option A.
506. Saponification number of an oil or fat
Gives an idea about its molecular weight
Is inversely proportional to its molecular weight
Detects its adulteration
All of the above
✅ The correct answer is option D.
508. Oil produced by solvent extraction
Has low free fatty acid content
Is odourless
Both A & B
Neither A nor B
✅ The correct answer is option D.
509. Gun powder uses
Sulphur
Charcoal
Potassium nitrate
All of the above
✅ The correct answer is option D.
510. With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
Increases
Increases linearly
Decreases
Decreases linearly
✅ The correct answer is option C.