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Statement-1: Aniline on reaction with NaNO2/HCl at 0 °C followed by coupling with β-naphthol gives a dark blue precipitate.

Statement-2 : The colour of the compound formed in the reaction of aniline with NaNO2/HCl at 0 °C followed by coupling with β-naphthol is due to the extended conjugation.

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Important Questions on Amines

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-3>Q 54

Which one of the following methods is neither meant for the synthesis nor for separation of amines?

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 1
Select correct statement from the following:
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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 3

Which of the following is incorrect about the given molecules

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 4
Which is most basic in aqueous solution?
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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 5

Base strength is in the order of

i CH3C¯H2 ii H2C=C⊝H and (iii) H-C≡C⊝

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 6

The proper tautomeric structure for 2-aminopyridine (X) is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 7

Choose the most appropriate pair of nitrogens that gets protonated in the following structures:

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Alpha Question Bank for Engineering: Chemistry>Chapter 28 - Amines>Exercise-4>Q 8
As the base changes from RNH2 to R2NH, to R3N the basicity: