Chemical Engineering - Chemical Process

11. 

Chalcopyrite is the main ore of

A. copper
B. lead
C. tin
D. iron

Answer: Option A

Explanation:

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12. 

The end bleaching agent used to move last traces of colour bodies from the pulp is

A. chlorine dioxide (ClO2)
B. MgO
C. SO2 gas
D. mercaptans

Answer: Option A

Explanation:

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13. 

Bio-degradable detergents

A. can be readily oxidised.
B. pose problem in sewerage plant.
C. have an isoparaffinic structure.
D. should not be used as it spoils the cloth.

Answer: Option A

Explanation:

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14. 

Sea water contains about __________ ppm of bromine.

A. 5
B. 70
C. 500
D. 1700

Answer: Option B

Explanation:

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15. 

Which allotrope of sulphur is insoluble in carbon disulphide ?

A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of sulphur

Answer: Option C

Explanation:

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