The compound with molecular formula , which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ______ electrons. [2025]

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Solution

Q.
The compound with molecular formula $C_{6} H_{6}$ , which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ______ $π$ electrons. [2025]

Ans.
(8)

$H_{3} C - C \equiv C - C \equiv C - {CH}_{3} \overset{{Br}_{2} + hν}{\to} H_{3} C - C \equiv C - C \equiv C - {CH}_{2} Br$

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