Fuels and Combustion
Benzene is used

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)
As an explosive
As a perfume
As a motor fuel

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Fuels and Combustion
Which of the following would require least amount of secondary air for combustion?

Semi-bituminous coal containing 25% ash and 20% volatile matter
Coke breeze containing 25% ash and 2% volatile matter
Bituminous coal containing 20% ash and 25% volatile matter
Anthracite containing 10% volatile matter and 8% ash

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