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CHEMISTRY

Chemistry
Which one of the following is known as the 'brown coal'?

Lignite
Coke
Bituminous
Anthracite

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Chemistry
L.P.G. is mostly liquefied

Methane
Hydrogen
Oxygen
Butane

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Chemistry
Which one of the following is not coal variety?

Bituminous
Peat
Lignite
Dolomite

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Tetraethyl lead
Triethyl lead
Trimethyl lead
Tetramethyl lead

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Chemistry
The quality of petrol is expressed in terms of

Octane number
Cetane number
Gold number
Added unlead compounds

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