Assertion :Phenols give $o -$ and $p -$ nitrophenol on nitration with concentrated $H N O_{3}$ and $H_{2} S O_{4}$ mixture. Reason: $- O H$ group in phenol is $o - p -$ directing.

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
$- O H$ group in phenol shows $(+ m)$ effect and increases the electron density of the ring, thus forcing the $- N O_{2}^{+}$ to be attached on $o, p -$ positions.
Both Assertion and Reason are correct and reason is the correct explanation for Assertion.

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Similar questions

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) o-nitrophenol is less soluble in water than the m- and p-isomers.
Reason (R) m and p-nitrophenols exist as associated molecules.
(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) p-nitrophenol is more acidic than phenol.
Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(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) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(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.

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:
Assertion: Nitrating mixture used for carrying our nitration of benzene consists of

c o n c . H N O_{3} + c o n c . H_{2} S O_{4} .

Reason :In presence of

H_{2} S O_{4}, H N O_{3}

acts as a base and produces

N O_{2}^{+}

ions.

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Assertion :Phenols give o− and p−nitrophenol on nitration with concentrated HNO3 and H2SO4 mixture. Reason: −OH group in phenol is o−p−directing.

Assertion :Phenols give $o -$ and $p -$ nitrophenol on nitration with concentrated $H N O_{3}$ and $H_{2} S O_{4}$ mixture. Reason: $- O H$ group in phenol is $o - p -$ directing.