1.

Octane number of petrol (gasoline) can be increased by

Answer»

Aromatisation
Cracking
By adding anti-knocking agent
Nitration

Solution :Aromatisation leads to the formation of aromatic compounds form straight CHAIN hydrocarbons and alicyclic hydrocarbons which leads to INCREASE in octane NUMBER cracking , leads to formation of lower hydrocarbons which have HIGHER octane number. Antiknocking agent like lead TETRAETHYL also increase octane number of petrol. (d) is not possible


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