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Chemistry

Chemistry
Which of the following fuels causes minimum environmental pollution?

Kerosene
Diesel
Hydrogen
Coal

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Chemistry
Among the following, which is always found in free-state in nature?

Gold
Sodium
Copper
Silver

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Chemistry
An example of heterocyclic compound is

Anthracene
Furan
Benzene
Naphthalene

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Chemistry
Electric fuse is an alloy of

Copper and iron
Tin and lead
Carbon and tin
Zinc and lead

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Chemistry
Benzene cannot undergo :

Elimination
Substitution
Oxidation
Addition

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Chemistry
Which of the following is used as filler in tyre of rubber ?

Coal
Coke
Graphite
Carbon black

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