Chemical Engineering - Chemical Process

6. 

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

A. 15-30
B. 90-100
C. 250-300
D. <0

Answer: Option A

Explanation:

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7. 

Cement mainly contains

A. CaO, SiO2, Al2O3
B. MgO, SiO2, K2O
C. Al2O3, MgO, Fe2O3
D. CaO, MgO, K2O

Answer: Option A

Explanation:

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8. 

Sand and __________ is fused at 1300°C, to produce sodium silicate.

A. limestone
B. soda ash
C. coke
D. sodium sulphate

Answer: Option B

Explanation:

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9. 

Coke used for the production of calcium carbide should have

A. low ash content.
B. low ignition temperature.
C. high electrical resistivity.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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10. 

Sucrose is a disaccharide consisting of

A. glucose and glucose
B. glucose and fructose
C. glucose and galactose
D. fructose and galactose

Answer: Option B

Explanation:

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