Chemical Engineering - Chemical Process

11. 

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A. electrolysis
B. electrolytic reduction
C. electrolytic oxidation
D. none of these

Answer: Option B

Explanation:

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12. 

Bakelite is chemically known as

A. polyvinyl chloride (PVC)
B. polybutadiene
C. phenol formaldehyde
D. polyurathane

Answer: Option C

Explanation:

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13. 

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?

A. Na2CO3
B. NaHCO3
C. H2
D. none of these

Answer: Option C

Explanation:

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14. 

Phthalic anhydride is made by the

A. oxidation of naphthalene.
B. oxidation of benzene.
C. dehydrogenation of ethyl benzene.
D. none of these.

Answer: Option A

Explanation:

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15. 

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

A. cyclo trimethylene trinitramine.
B. trinitro resorcinol.
C. cyclo tetramethylene tetranitramine.
D. trinitro benzene.

Answer: Option A

Explanation:

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