Assertion : $1 m o l$ of $H_{2} S O_{4}$ is neutralised by $2 m o l$ of $N a O H$ ; however, $1$ equivalent of $H_{2} S O_{4}$ is neutralised by $1$ equivalent of $N a O H$ . Reason: Equivalent mass of $H_{2} S O_{4}$ is half of its molecular mass, however, the equivalent mass of $N a O H$ is equal to its molecular mass.

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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Assertion is incorrect but Reason is 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

$1 m o l$ of $H_{2} S O_{4}$ is neutralised by $2 m o l$ of $N a O H$ ; however, $1$ equivalent of $H_{2} S O_{4}$ is neutralised by $1$ equivalent of $N a O H$ .This is due to the reason that equivalent mass of $H_{2} S O_{4}$ is half of its molecular mass, however, the equivalent mass of $N a O H$ is equal to its molecular mass.
So both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Hence option A is correct.

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Similar questions

Q. Assertion: In the reaction:

2 N a O H + H_{3} P O_{4} \to N a_{2} H P O_{4} + 2 H_{2} O

The Equivalent weight of

H_{3} P O_{4}

\frac{M}{3}

, where M is its molar mass
Reason: Equivalent weight

= \frac{Molar mass}{n-factor}

Assertion: The mass of Chlorine is 35.5 u

Reason: For elements having isotopes, the average of mass of its isotopes is considered as the atomic mass of that element.

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 (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) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

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Assertion :1 mol of H2SO4 is neutralised by 2 mol of NaOH; however, 1 equivalent of H2SO4 is neutralised by 1 equivalent of NaOH. Reason: Equivalent mass of H2SO4 is half of its molecular mass, however, the equivalent mass of NaOH is equal to its molecular mass.