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Standard XII

Chemistry

Sulphuric Acid

Assertion :Co...

Question

Assertion :Concentrated $H_{2} S O_{4}$ reacts with $K C l$ to give ${C l}_{2}$ gas Reason: $H C l$ cannot be oxidised by concentrated $H_{2} S O_{4}$

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 D Assertion is incorrect but Reason is correct
Concentrated $H_{2} S O_{4}$ and $H C l$ remains unreacted in the mixture because concentrated $H_{2} S O_{4}$ can't oxidize. So Assertion is false and reason is true.

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Similar questions

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

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: 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 :Concentrated H2SO4 reacts with KCl to give Cl2 gas Reason: HCl cannot be oxidised by concentrated H2SO4

The correct option is D Assertion is incorrect but Reason is correctConcentrated H2SO4 and HCl remains unreacted in the mixture because concentrated H2SO4 can't oxidize. So Assertion is false and reason is true.

Assertion :Concentrated $H_{2} S O_{4}$ reacts with $K C l$ to give ${C l}_{2}$ gas Reason: $H C l$ cannot be oxidised by concentrated $H_{2} S O_{4}$

The correct option is D Assertion is incorrect but Reason is correct
Concentrated $H_{2} S O_{4}$ and $H C l$ remains unreacted in the mixture because concentrated $H_{2} S O_{4}$ can't oxidize. So Assertion is false and reason is true.