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A gas on passing through ammonical solut...

A gas on passing through ammonical solution of `AgNO_(3)` does not give any precipitate but decolourises alkaline `KMnO_(4)` solution. The gas may be:

A

`C_(2)H_(2)`

B

`C_(2)H_(4)`

C

`C_(3)H_(4)`

D

`C_(3)H_(8)`

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The correct Answer is:
B
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