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Standard XII

Chemistry

Catalytic Hydrogenation

Assertion :Pr...

Question

Assertion :Propene reacts with $H B r$ in the presence of benzoyl peroxide to yield 2-bromopropane. Reason: In presence of peroxide, the addition of $H B r$ to propene follows ionic mechanism.

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 D Both Assertion and Reason are incorrect
Propene reacts with $H B r$ in the presence of benzoyl peroxide to give 1-bromopropane.

In the presence of peroxide, the addition of $H B r$ to propane occurs by the free radical mechanism.

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Similar questions

Q. Assertion :Addition of HBr to propene yields 2-bromopropane but in presence of a peroxide it yields 1-bromopropane. Reason: When reaction is carried out in the presence of a peroxide it follows free radical mechanism,

2^{0}

free radical is more stable than

1^{0}

free radical.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

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

Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

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

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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Assertion :Propene reacts with HBr in the presence of benzoyl peroxide to yield 2-bromopropane. Reason: In presence of peroxide, the addition of HBr to propene follows ionic mechanism.

The correct option is D Both Assertion and Reason are incorrectPropene reacts with HBr in the presence of benzoyl peroxide to give 1-bromopropane. In the presence of peroxide, the addition of HBr to propane occurs by the free radical mechanism.

Assertion :Propene reacts with $H B r$ in the presence of benzoyl peroxide to yield 2-bromopropane. Reason: In presence of peroxide, the addition of $H B r$ to propene follows ionic mechanism.

The correct option is D Both Assertion and Reason are incorrect
Propene reacts with $H B r$ in the presence of benzoyl peroxide to give 1-bromopropane.

In the presence of peroxide, the addition of $H B r$ to propane occurs by the free radical mechanism.