581. Which of the following is used as a binding material in soap to improve soap texture?
Rosin
Borax
Benzyl acetate
Sodium carbonate
✅ The correct answer is option B.
Chemical Process MCQs
582. Which of the following processes does not produce Cl₂ as a co-product during the manufacture of caustic soda?
Diaphragm electrolytic cell process
Mercury electrolytic cell process
Lime-soda process
None of these
✅ The correct answer is option C.
583. Cooking liquor in case of sulphite process is
Sodium sulphite and sodium bisulphite
Magnesium sulphite and free SO₂ in acid medium
Magnesium sulphate and magnessium bicarbonate
None of these
✅ The correct answer is option A.
584. In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ⇋ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by
Increasing the oxygen concentration
Putting more quantity of V₂O₅ catalyst in the converter
Removing some quantity of SO₃ during intermediate stage
Maintaining low temperature & pressure in the converter
✅ The correct answer is option C.
585. Phenolic antiseptics are added in the __________ soap.
Shaving
Medicated
Metallic
Transparent
✅ The correct answer is option B.
586. Which one of the following is not likely to be a constituent of vegetable oils?
Citric acid
Oleic acid
Stearic acid
Glycerol
✅ The correct answer is option A.
587. Starting material for the production of butadiene in India is
Naphthalene
Benzol
Ethyl alcohol
Phthalic anhydride
✅ The correct answer is option C.
588. Reaction of calcium carbide with water produces a gas, which is used
As an illuminant
For metal cutting/welding
Both A & B
Neither A nor B
✅ The correct answer is option C.
589. Temporary hardness of water can be removed by
Addition of alum (a coagulant)
Boiling
Filtration (through gravity sand filter)
Addition of lime
✅ The correct answer is option B.
590. Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?
Depithing
Digestion
Bleaching
None of these
✅ The correct answer is option A.