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Chemical Process

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

3
22
0.3
12

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Chemical Process
Styrene is produced from ethyl benzene by the process of

Dehydration
Oxidation
Dehydrogenation
Alkylation

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Chemical Process
Ore concentration by froth floatation utilises the __________ of ore particles.

Density difference
None of these
Terminal velocities
Wetting characteristics

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Chemical Process
Sodium chloride content in sea water is about __________ gms/litre.

10
25
50
2

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Chemical Process
__________ is produced by the dehydrogenation of ethyl benzene.

Cumene
Styrene
Phenol
Ethyl alcohol

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Chemical Process
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?

1500°C
1000°C
750°C
500°C

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