Practice Pakistan's most useful MCQs for competitive exams

The process used for the manufacture of ethyl alcohol from molasses is_________________?

• (A)  Distillation
• (B)  Dehydration
• (C)  Dehydrogenation
• (D)  None of these

Answer

Submitted By :Ali Uppal

Adipic acid is an intermediate in the manufacture of________________?

• (A)  Perspex
• (B)  Nylon-66
• (C)  Polystyrene
• (D)  Bakelite

Answer

Submitted By :Ali Uppal

Alcohol percentage in molasses may be around _____________________?

• (A)  10
• (B)  40
• (C)  70
• (D)  85

Answer

Submitted By :Ali Uppal

Liquefaction of gases cannot be done by___________________?

• (A)  Exchange of heat with colder stream
• (B)  Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
• (C)  Merely compressing it beyond critical pressure
• (D)  Adiabatic expansion against a piston or in a turbine

Answer

Submitted By :Ali Uppal

Cumene is the starting material for the production of________________?

• (A)  Benzoic acid
• (B)  Phenol and acetone
• (C)  Isoprene
• (D)  Styrene

Answer

Submitted By :Ali Uppal

Margarine is a/an____________________?

• (A)  Fat
• (B)  Explosive
• (C)  Plasticiser
• (D)  Rocket propellant

Answer

Submitted By :Ali Uppal

Bromine content in sea water may be around _________________ ppm?

• (A)  70
• (B)  640
• (C)  1875
• (D)  2500

Answer

Submitted By :Ali Uppal

Heating of _______________ to 120°C, produces plaster of paris ?

• (A)  Blue vitriol
• (B)  Gypsum
• (C)  Calcium silicate
• (D)  Calcium sulphate

Answer

Submitted By :Ali Uppal

Which of the following is used as a binding material in soap to improve soap texture ?

• (A)  Rosin
• (B)  Borax
• (C)  Benzyl acetate
• (D)  Sodium carbonate

Answer

Submitted By :Ali Uppal

Glauber’s salt is chemically represented by____________________?

• (A)  Na2SO4.10H2O
• (B)  CaCl(OCl)
• (C)  CaSO4.H2O
• (D)  (NH4)2SO4

Answer

Submitted By :Ali Uppal