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Potassium Permanganate

1-Chlorobutan...

Question

$1$ -Chlorobutane on reaction with alcoholic potash gives:

A

1

-butene

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B

1

-butanol

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C

2

-butene

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D

2

-butanol

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Solution

The correct option is C $1$ -butene
Alc. $K O H$ is a dehydrohalogenation agent, it reacts with an alkyl halide and alkene forms as a product.

Reaction of process:
$C H_{3} C H_{2} C H_{2} C H_{2} C l a l c . K O H - ---- \to C H_{3} C H_{2} C H = C H_{2}$

Option A is correct.

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Similar questions

Q. Assertion :2-Butanol on heating with

H_{2} S O_{4}

gives 1-butene and 2-butene. Reason: Dehydration of 2-butanol follows Saytzeff rule.

Q. A mixture of two alcohols

3 -

- 1 -

2 -

- 1 -

butanol, given chiefly

2 -

- 2 -

butene when dehydrated with acid.

2 -

- 2 -

butene is converted into

2 -

- 2 -

butanol with approximately 90% yield by treatment with 50% aqueous solution of sulphuric acid at

0^{\circ}

C. Write equation showing mechanism of conversions.

Q. 2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is

Q. Assertion :Treatment of

3

1

H g (C H_{3} C O O)_{2} - H_{2} O

followed by reduction with

N a B H_{4}

2

2

-butanol. Reason: The reaction proceeds through a cyclic mercurinium ion reactive intermediate.

Predict all the possible products for the reaction of 2-chlorobutane with alcoholic $K O H$ .

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