Hard
Soft
Metallic
Lubricating
✅ The correct answer is option B.
Chemical Process MCQs
72. Pencillin is made employing __________ fermentation process.
Continuous
Aerobic batch
Anaerobic batch
None of these
✅ The correct answer is option B.
73. Coke oven gas consists mainly of
H₂, & CH₄
CO, & CO₂
H₂, & CO
CH₄, & CO
✅ The correct answer is option A.
74. Which of the following is not a product of coal tar distillation?
Anthracene
Cresote oil
Carbolic oil
None of these
✅ The correct answer is option D.
75. Acetone is produced by catalytic dehydrogenation of
Phenol
Naphthalene
Isopropanol
Ethyl benzene
✅ The correct answer is option C.
76. Which of the following has sodium bicarbonate as its main constituent ?
Baking soda
Baking powder
Washing soda
None of these
✅ The correct answer is option B.
77. Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
✅ The correct answer is option B.
78. During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to
Increase the rate of absorption
Avoid corrosion
Reduce the cooling water circulation rate
None of these
✅ The correct answer is option B.
79. Electrodeposition of metals i.e. electroplating is never done on
Metals
Alloys
Refractories
Non-metals
✅ The correct answer is option C.
80. Presence of sodium tripolyphosphate (an additive) in synthetic detergent
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
Inhibits its corrosive effects
Does not allow redeposition of dirt on the cleaned surface
None of these
✅ The correct answer is option A.