Alkynes have a general formula:

CnH2n+1

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CnH2n -2

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CnH2n+2

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CnH2n

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Solution

The correct option is B
CnH2n -2

Alkynes are unsaturated hydrocarbons with triple bonds, therefore contain minimum hydrogen atoms.

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Similar questions

2nd member of homologous series having general formula $C_{n} H_{2 n - 2}$

(C_{n} H_{2 n + 2})

C_{n} H_{2 n}

C_{n} H_{2 n - 1} C O O H

C_{n} H_{2 n + 1} (O H)_{3}

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