NaOH
H₂SO₄
Hydrazine
Alum solution
✅ The correct answer is option A.
Chemical Process MCQs
142. Industrial production of chloroform requires acetone and
Phosgene
Calcium hypochlorite
Chlorine
Ammonium chloride
✅ The correct answer is option B.
143. Coke used for the production of calcium carbide should have
Low ash content
Low ignition temperature
High electrical resistivity
All of the above
✅ The correct answer is option D.
144. Linde process of gas liquefaction employs
Exchange of heat with colder stream
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Adiabatic expansion against a piston or in a turbine
Merely compressing the gas beyond its critical pressure
✅ The correct answer is option B.
145. Air used in aerobic fermentation must be sterilized, otherwise the
Recovery of product will be difficult
Contamination of pure culture would result
Uniformity of product cannot be achieved
None of these
✅ The correct answer is option B.
146. __________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
✅ The correct answer is option B.
147. Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
✅ The correct answer is option D.
148. Which of the following is used as a coagulant in water treatment?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide
✅ The correct answer is option C.
149. Dense soda ash used in the manufacture of glass, is chemically represented by
Na₂CO₃
Na₂CO₃.10H₂O
Na₂CO₃.H₂O
Na₂HCO₃
✅ The correct answer is option C.
150. Dacron is a
Condensation product of hexam-ethylene diamine and adipic acid
Thermosetting material
Condensation product of dimethyl terephthalate and ethylene glycol
None of these
✅ The correct answer is option D.