Chemical Engineering - Chemical Process

41. 

Presence of sodium tripolyphosphate (an additive) in synthetic detergent

A. facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).
B. inhibits its corrosive effects.
C. does not allow redeposition of dirt on the cleaned surface.
D. none of these.

Answer: Option A

Explanation:

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42. 

Dense soda ash used in the manufacture of glass, is chemically represented by

A. Na2CO3
B. Na2CO3.10H2O
C. Na2CO3.H2O
D. Na2HCO3

Answer: Option C

Explanation:

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43. 

Reverse osmosis is normally used for the

A. separation of isotopes of uranium from gaseous uranium hexaflouride.
B. separation of helium from natural gas.
C. desalination of brackish water to produce potable (drinking) water.
D. purification of oxygen.

Answer: Option C

Explanation:

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44. 

Hydrazine is largely used

A. as a starting material for 'hypo'.
B. in photographic industry.
C. as rocket fuel.
D. in printing industry.

Answer: Option C

Explanation:

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45. 

'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of

A. N2 & H2
B. CO2 & H2
C. CO & H2
D. C & H2

Answer: Option C

Explanation:

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