CameraIcon

SearchIcon

MyQuestionIcon

22

You visited us 22 times! Enjoying our articles? Unlock Full Access!

Nucleophilic Addition at the Carbonyl

A white cryst...

Question

A white crystalline solid “X” gives following chemical tests:
(i) it liberates $C O_{2}$ with $N a H C O_{3}$
(ii) It forms a coloured dye on diazotisation and coupling with $β$ -napthol
(iii) With $B r_{2}$ water it forms white ppt of 2, 4, 6 – tribromo aniline.
Then “X” can be:

A

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B

Suggest Corrections

thumbs-up

0

Similar questions

Q. A white crystalline solid give following chemical test: ' X'
(i) It liberates CO2 with

N a H C O_{3}

(ii) It forms a coloured dye on diazotization and coupling with

β

-Naphthol
(iii) With

B r_{2}

water it forms white precipitate of 2, 4, 6 – tribromo aniline. ‘X’ can be identified as:

^{'} A^{'}

is treated with a freshly prepared ammonical silver nitrate solution, it gives bright silver mirror. The liquid forms a white crystalline soild on treatment with sodium hydrogensulphit. Liquid

^{'} B^{'}

also forms a white crystalline solid with sodium hydrogensulphite but it does not give test with ammoniacal silver nitrate. Which of the two liquids is aldehyde? Write the chemical equations of these reactions also.

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

X

has molecular formula

C_{7} H_{7} N O

. On treatment with

{B r}_{2}

K O H

X

Y

. The later gives carbylamine test.

Y

upon diazotisation and coupling with phenol gives an azo dye. Thus,

X

Q. Assertion :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. 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.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Nucleophilic Addition Revisited

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Nucleophilic Addition at the Carbonyl

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon