Industrial Chemical MCQs with Answers

is a technique to separate impurities from chemical products.

• A.Fractional crystallization
• B.Fractional distillation
• C.Chromatography
• D.Sublimation

What is the ratio between N₂ and H₂ in ammonia preparation?

• A.1 : 3
• B.3 : 1
• C.1 : 2
• D.2 : 1

The separation of substances in distillation depends upon?

• A.Density
• B.Melting points
• C.Solubility
• D.Boiling points

Past Paper MCQ

The process by which metal surface is coated with thin layer of zinc is called _?

• A.Tinning
• B.Electroplating
• C.Anodizing
• D.Galvanizing

Formalin is a mixture of?

• A.40% HCHO, 8% CH₃OH, 52% H₂O
• B.40% CH₃OH, 8% HCHO, 52% H₂O
• C.40% HCHO, 10% CH₃OH, 50% H₂O
• D.50% HCHO, 10% CH₃OH, 40% H₂O

Where is Sulphur widely used in chemical industries?

• A.In manufacture of explosives
• B.In manufacture of glass
• C.In manufacture of fertilizers only
• D.In manufacture of plastics

The flame used in cutting and welding of metals is ?

• A.LPG flame
• B.Oxyhydrogen
• C.Oxyacetylene
• D.Bunsen flame

Which of the following is a key component in the production of ion exchange resins?

• A.Zeolite
• B.Graphite
• C.Silica gel
• D.Activated charcoal

Identify the CORRECT option required for the maximum yield of ammonia by Haber's process?

• A.Low pressure, low temperature, continual addition of hydrogen
• B.Low pressure, high temperature, continual addition of nitrogen
• C.High pressure, high temperature, continual removal of ammonia
• D.High pressure, low temperature, continual removal of ammonia

Why is gypsum added to cement?

• A.To increase the strength
• B.To improve the colour
• C.To control the setting time
• D.To reduce the weight