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Physical Properties of Alkynes

CaC 2 H 2 O ⟶...

Question

$C a C_{2} H_{2} O - - \to A C u_{2} C l_{2} - ---- \to N H_{4} O H B .$ Incorrect statement is

A

Pure form of 'A' has garlic smell

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B

'A' is used in Hawker's lamp and Holme's signal

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C

'B' is red ppt

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D

Oxidation state of 'Cu' in Cu₂Cl₂ and 'B' is same

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Solution

The correct option is A
Pure form of 'A' has garlic smell

Garlic smell is due to impurities in acetylene like $P H_{3} + H_{2} S$
B is a reddish brown precipitate of $C u_{2} C_{2}$ .

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