Chemical Engineering - Chemical Process

41. 

Chemical formula of BHC, which is an insecticide is

A. C6H6Cl6
B. C6Cl6
C. C6H5Cl
D. C6H4Cl2

Answer: Option B

Explanation:

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42. 

A bio-catalyst produced by living cells which acts independent of the cell is called a/an

A. substrate
B. enzyme
C. nutrient
D. none of these

Answer: Option B

Explanation:

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43. 

Pick out the wrong statement.

A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction.
B. Chloral is obtained by the chlorination of ethyl alcohol.
C. Insecticides acting on the insects through the respiratory system are called fumigants.
D. Benzene hexachloride is not a contact insecticide.

Answer: Option D

Explanation:

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44. 

The product obtained on mixing calcium oxide with water is called

A. quicklime
B. slaked lime
C. milk of lime
D. none of these

Answer: Option B

Explanation:

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45. 

The major constituent of black liquor generated during paper manufacture is sodium

A. sulphate
B. carbonate
C. hydroxide
D. bi-carbonate

Answer: Option B

Explanation:

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