Assertion - CH3- CH3- CH3-C-CH2-Br-NaOH- CH3- CH3- CH3-C-CH2-OH major- Reason- It follows with formation of more stable carbanion-

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Byju's Answer

Standard XII

Chemistry

Stereoisomerism

Assertion : ...

Question

Assertion : $C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - B r + N a O H \to C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - O H$ (major). Reason: It follows with formation of more stable carbanion.

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
$N a O H$ dissociates to form $N a^{+}$ and $O H^{-}$ . While $O H^{-}$ replaces $B r^{-}$ from the compound, the carbocation is formed and since $3^{0}$ -carbocation is better than $2^{0}$ -carbocation, shifting will take place.
So, the product gives as major is actually minor.
Therefore, both Assertion and Reason are incorrect.

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Similar questions

Q. Assertion :

C H_{3}

C H_{3}

|

|

C H_{3} - C - C H_{2} - B r + N a O H ⟶ C H_{3} - C - C H_{2} - C H_{3}

|

|

C H_{3}

O H

Reason: It follows with formation of more stable carbocation.

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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.

Assertion (A) Phenols give o-and p-nitrophenol on nitration with conc. $H N O_{3} a n d H_{2} S O_{4}$ mixture.
Reason (R) - OH group in phenol is o-,p-directing.
(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.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :CH3−CH3|C|CH3−CH2−Br+NaOH→CH3−CH3|C|CH3−CH2−OH (major). Reason: It follows with formation of more stable carbanion.

Assertion : $C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - B r + N a O H \to C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - O H$ (major). Reason: It follows with formation of more stable carbanion.