Chemical Process MCQs

Question 1

Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove

Accepted Answer

All of the above

Answer

Colour

Answer

Turbidity

Answer

Bacteria

Question 2

Glauber's salt is chemically represented by

Accepted Answer

Na2SO4.10H2O

Answer

CaCl(OCl)

Answer

CaSO4.H2O

Answer

(NH4)2SO4

Question 3

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

Accepted Answer

Non-drying

Answer

Drying

Answer

Semi-drying

Answer

None of these

Question 4

An alkali metal salt of palmitic acid is known as

Accepted Answer

Metallic soap

Answer

Soap

Answer

Detergent

Answer

Alkaloid

Question 5

Which form of sulphur is the most stable at room temperature?

Accepted Answer

Rhombic

Answer

Plastic

Answer

Monoclinic

Answer

Flowers of sulphur

Question 6

Alcohol percentage in molasses may be around

Accepted Answer

40

Answer

10

Answer

70

Answer

85

Question 7

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

Accepted Answer

All of the above

Answer

Poor oxidation stability and high gum forming tendency

Answer

Greater tendency of decomposition at elevated temperature

Answer

Hydrolysis tendency in presence of water

Question 8

Triple superphosphate is manufactured by reacting

Accepted Answer

Phosphate rock with phosphoric acid

Answer

Phosphate rock with sulphuric acid

Answer

Phosphate rock with nitric acid

Answer

Ammonium phosphate with phosphoric acid

Question 9

Teflon is

Accepted Answer

Poly tetrafluoroethylene (P.T.F.E.)

Answer

Phenol formaldehyde

Answer

An inorganic polymer

Answer

A monomer