Chemical Engineering - Chemical Process

46. 

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

A. reduce its viscosity.
B. increase its viscosity.
C. reduce the variation in its viscosity with temperature.
D. increase the variation in its viscosity with temperature.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

47. 

Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction

A. decreases with decrease of thickness of the flakes.
B. increases with the increasing flake size keeping the flake thickness constant.
C. increases Considerably with the rise of temperature.
D. decreases as the moisture content of flakes increases.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

48. 

Sea weeds are an important source of

A. fluorine
B. chlorine
C. bromine
D. iodine

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

49. 

Polythene is a/an __________ polymerisation product.

A. addition
B. condensation
C. thermosetting
D. none of these

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

50. 

Catalytic oxidation-dehydrogenation of methyl alcohol produces

A. formaldehyde
B. phenol
C. acetone
D. maleic anhydride

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

« Prev   1 2 3 4 5 6 7 8 9 10