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Hydrogenation of Alkynes

When propyne ...

Question

When propyne is treated with aqueous $H_{2} S O_{4}$ in the presence of $H g S O_{4}$ , the major product is:

A

Propanal

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B

Propyl hydrogen sulphate

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C

Acetone

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D

Propanol

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Solution

The correct option is C Acetone
Like alkanes and alkenes, alkynes are also immiscible in water and do not react with water. However, one molecule of water adds to an alkyne on warming with $H g S O_{4}$ and dil. $H_{2} S O_{4}$ at 333 K to form a carbonyl compound.

So, the correct answer will be option (c).

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Hydrogenation of Alkynes

Standard XII Chemistry

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