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Standard XII

Chemistry

Difference between Internal Energy and Enthalpy

Assertion : ...

Question

Assertion : $H_{2} C O_{3}$ is a strong acid. Reason: A strong acid dissociates completely or almost completely in water.

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 not correct but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is not correct but Reason is correct
$H_{2} C O_{3}$ is a weak acid. A strong acid ionizes completely or almost completely in water.

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Similar questions

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 – 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: 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.

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 :H2CO3 is a strong acid. Reason: A strong acid dissociates completely or almost completely in water.

The correct option is C Assertion is not correct but Reason is correctH2CO3 is a weak acid. A strong acid ionizes completely or almost completely in water.

Assertion : $H_{2} C O_{3}$ is a strong acid. Reason: A strong acid dissociates completely or almost completely in water.

The correct option is C Assertion is not correct but Reason is correct
$H_{2} C O_{3}$ is a weak acid. A strong acid ionizes completely or almost completely in water.