Assertion :When $P h C H O$ is made to react in $O D^{⊖} / D_{2} O$ no $D$ is incorporated into the $C H_{2}$ of $P h C H_{2} O H$ , $P h C O O^{-}$ mixture during cannizaro's reaction Reason: Intermolecular $H^{⊖}$ transfer takes place in the rate determining step, with out getting free in solution

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 incorrect but Reason is correct

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Both Assertion and Reason are correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The cannizzaro reaction occurs through intermolecular hydride transfer from one molecule of benzaldehyde to other molecule of benzaldehyde.
Hence, no duterium is encorporated into the methylene group of the alcohol.
Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Similar questions

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

(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.

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

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 (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

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.

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Assertion :When PhCHO is made to react in OD⊖/D2O no D is incorporated into the CH2 of PhCH2OH, PhCOO− mixture during cannizaro's reaction Reason: Intermolecular H⊖ transfer takes place in the rate determining step, with out getting free in solution