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Question

A metallic carbide on treatment with water gives a colourless gas which burns readily in air and which gives a precipitate with ammoniacal silver nitrate solution. Gas evolved is


A

Methane

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B

Ethane

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C

Acetylene

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D

Ethylene

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Solution

The correct option is C

Acetylene


CaC2+2H2OCa(OH)2+C2H2CHCH+2[Ag(NH3)2]OH AgCCAg+4NH3+2H2O White ppt.


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