Which of the following reacts with Tollen's reagent giving white precipitate?

2-pentene

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2-pentyne

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1-butyne

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1-butanol

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Solution

The correct option is B 1-butyne
Tollen's reagent consists of a solution of silver nitrate and ammonia.
Terminal alkynes react with tollen's reagent and form white color precipitate.
so 1-butyne reacts with tollen's reagent and give white precipitate.

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