(a) Define isomerism. Draw all possible isomers of butane.(b) ‘‘A compound ‘X’ on combustion gives a yellow flame with lots of smoke.’’ What inference would you draw from this statement?(c) State the role of alkaline KMnO₄ in the reaction involving conversion of an alcohol to corresponding carboxylic acid.

(a) Isomers are compounds with the same molecular formula but different structural formula.

Isomers of butane, C4H10 are given below:

n- butane

iso-butane

(b) Unsaturated hydrocarbons like ethyne produce a yellow flame when burnt in oxygen due to incomplete combustion in air. The percentage of carbon is comparatively higher than that of alkanes and so does not get completely oxidized in air.

(c)  The role of alkaline KMnO4 in the reaction involving conversion of an alcohol to corresponding carboxylic acid is that it is used as an oxidizing agent, as it oxidizes alcohol to acid.

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Updated on: 10-Oct-2022

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