Which of the following is not used to distinguish ethylene from ethane?

Bromine dissolved in

{C C l}_{4}

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Aqueous Alkaline

{K M n O}_{4}

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Ammonical cuprous chloride

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Concentrated

H_{2} {S O}_{4}

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Solution

The correct option is B Ammonical cuprous chloride
Among all given reagents above ammonical cuprous chloride reacts with alkyne only and give red precipitate but it doesnt reacts with alkane and alkene.
All other reagents reacts with alkene only and not with alkane so they can be used to distinguish between alkane and alkene.

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(i) C H_{3} - C \equiv C - C H_{3}

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K M n O_{4}

{K M n O}_{4}

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