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Standard XII

Chemistry

Electrophile

Assertion :Be...

Question

Assertion :Benzene on heating with conc. $H_{2} {S O}_{4}$ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason: Sulphonation is a reversible process.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Sulphonation of benzene is an electrophilic substitution reaction in which $S O_{3}$ acts as the electrophile.

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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 (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) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.
Reason (R) Lewis acid polarises the bromine molecule.
(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 – 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.

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Assertion :Benzene on heating with conc. H2SO4 gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason: Sulphonation is a reversible process.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionSulphonation of benzene is an electrophilic substitution reaction in which SO3 acts as the electrophile.

Assertion :Benzene on heating with conc. $H_{2} {S O}_{4}$ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason: Sulphonation is a reversible process.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Sulphonation of benzene is an electrophilic substitution reaction in which $S O_{3}$ acts as the electrophile.