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Physical Properties of Alkenes

Assertion : ...

Question

Assertion : $C i s$ -2-butene gives $m e s o$ -2,3-butanediol with dilute alkaline $K M n O_{4}$ solution. Reason: Dilute alkaline $K M n O_{4}$ solution given trans addition with alkenes.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Alkaline $K M n O_{4}$ always gives cis-addition on olefins.

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Similar questions

2

K M n O_{4}

2, 3

M n O_{4}^{-}

H_{2}

H e

(1 + \frac{P b}{R T})

H_{2}

H e

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

{SiO}_{2}

{2n}^{2}

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