Question

A trinitro compound, 1, 3,5 tris-(4-nitrophenyl) benzene, on complete reaction with an excess of

Sn / HCl

gives major product, which on treatment with an excess of

NaNO_{2} / HCl

at

0^{\circ} C

provides P as the product. P, upon treatment with excess of

H_{2} O

at room temperature, gives the product

Q

. Bromination of

Q

in aqueous medium furnishes the product

R

. The compound

P

upon treatment with an excess of phenol under basic conditions gives the product S.

The molar mass difference between compounds

Q

and

R

is

474 mol^{- 1}

and between compounds

P

and

S

is

172.5 g mol^{- 1}

.

The number of heteroatoms present in one molecule of

R

is ____.
[Use: Molar mass (in

g mol^{- 1}

):

H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5

Atoms other than C and H are considered as heteroatoms]

The molar mass difference between compounds $\mathbf{Q}$ and $\mathbf{R}$ is $474 \mathrm{~mol}^{-1}$ and between compounds $\mathbf{P}$ and $\mathbf{S}$ is $172.5 \mathrm{~g} \mathrm{~mol}^{-1}$.

The number of heteroatoms present in one molecule of $\mathbf{R}$ is ____.
[Use: Molar mass (in $\mathrm{g} \mathrm{mol}^{-1}$ ): $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{Br}=80, \mathrm{Cl}=35.5$
Atoms other than C and H are considered as heteroatoms]

Accepted Answer

9

JEE Advanced · 2023 · 04 Jun 2023 · Paper 2 · Compounds Containing Nitrogen

Solution

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