Chemical Engineering - Chemical Process

46. 

Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.

A. lead
B. borosilicate
C. soda lime
D. alkali silicate

Answer: Option B

Explanation:

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47. 

Prussian blue is chemically represented by

A. FeO.TiO2
B. Ca SO4 . 2H2O
C. Fe4 [Fe (CN6)3]
D. AlF3 . 3NaF

Answer: Option C

Explanation:

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48. 

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

A. nitric acid
B. hydrochloric acid
C. methyl alcohol
D. formic acid

Answer: Option A

Explanation:

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49. 

The most stable allotropic form of phosphorous is the __________ phosphorous.

A. white
B. black
C. yellow
D. red

Answer: Option B

Explanation:

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50. 

Function of thinner in a paint is to

A. accelerate the oxidation of oil.
B. prevent gelling of the paint.
C. suspend pigments & dissolve film forming materials.
D. form a protective film.

Answer: Option C

Explanation:

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