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Standard XII

Chemistry

Polarity and Dipole Moments

Assertion :An...

Question

Assertion :Aniline on reaction with ${N a N O}_{2} / H C l$ at $0^{o} C$ followed by coupling with $β$ naphthol gives a dark blue coloured precipitate. Reason: The colour of the compound formed in the reaction of aniline with ${N a N O}_{2} / H C l$ $0^{o} C$ followed by coupling with $β$ naphthol is due to extended conjugation.

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 and Reason are correct

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Solution

The correct option is D Assertion is incorrect and Reason are correct
Gives orange-red coloured precipitate.
Assertion is incorrect.
Colour of a compound is due to (besides other factor)extended conjugation. Hence, Reason is correct.

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Similar questions

Q.
Statement I: Aniline on reaction with

N a N O_{2} / H C l

0^{o} C

followed by coupling with

β

-naphthol gives a dark blue coloured precipitate.
Statement II: The colour of the compound formed in the reaction of aniline with

N a N O_{2} / H C l

0^{o} C

followed by coupling with

β

-naphthol.

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

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.

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.

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Assertion :Aniline on reaction with NaNO2/HCl at 0oC followed by coupling with βnaphthol gives a dark blue coloured precipitate. Reason: The colour of the compound formed in the reaction of aniline with NaNO2/HCl 0oC followed by coupling with βnaphthol is due to extended conjugation.

The correct option is D Assertion is incorrect and Reason are correctGives orange-red coloured precipitate.Assertion is incorrect. Colour of a compound is due to (besides other factor)extended conjugation. Hence, Reason is correct.

The correct option is D Assertion is incorrect and Reason are correct
Gives orange-red coloured precipitate.
Assertion is incorrect.
Colour of a compound is due to (besides other factor)extended conjugation. Hence, Reason is correct.