Coal tar (produced by high temperature carbonisation) is the main source of

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

A

Higher calorific value

B

Lower hydrogen content

C

Both A & B

D

Neither A nor B

In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

A

Difference in gross & net calorific value of the coke oven gas

B

Free carbon content in tar

C

Yield percentage of coke

D

Yield of ammonia present in coke oven gas

In high temperature carbonisation of coal compared to low temperature carbonisation

A

Yield of ammonia is less

B

Aromatic content of tar is low

C

H₂ content in the coke oven gas is more

D

Calorific value of the coke oven gas is lower

In high temperature carbonisation (as compared to low temperature carbonisation) of coal

A

Coke oven gas yield is more

B

Tar yield is less but free carbon in tar is more

C

Calorific value of coke oven gas is less

D

All of the above

In low temperature carbonisation (as compared to high temperature carbonisation) of coal

A

Ammonia yield is more

B

Aliphatic tar is produced

C

Free carbon in tar is more

D

All of the above

In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the

A

Gas yield is less

B

Tar yield is more

C

Ignition temperature of coke produced is less

D

Aromatic content of tar produced is more

Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.

A

10 & 3

B

3 & 10

C

15 & 8

D

10 & 20

The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

A

3

B

12

C

22

D

0.3

The main product of high temperature carbonisation of coal is

A

Coke

B

Ammonia

C

Tar

D

Phenol

Main use of hard coke produced by high temperature carbonisation is in the

A

Iron blast furnace

B

Cupola in foundaries

C

Sinter making

D

Domestic ovens

Coal tar (produced by high temperature carbonisation) is the main source of

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