Scheme 1 and 2 describe the conversion of $\mathbf{P}$ to $\mathbf{Q}$ and $\mathbf{R}$ to $\mathbf{S}$, respectively. Scheme 3 describes the synthesis of $\mathbf{T}$ from $\mathbf{Q}$ and $\mathbf{S}$. The total number of Br atoms in a molecule of $\mathbf{T}$ is ____

JEE Advanced · 2019 · 27 May 2019 · Paper 1 · Compounds Containing Nitrogen

Scheme 1 and 2 describe the conversion of

P

Q

and

R

S

, respectively. Scheme 3 describes the synthesis of

T

from

Q

and

S

. The total number of Br atoms in a molecule of

T

is ____

Answer: 4

Solution

Following the reaction schemes:

Scheme 1: P undergoes bromination and subsequent transformations to give Q, which contains 2 Br atoms.

Scheme 2: R undergoes transformations to give S, which contains 2 Br atoms.

Scheme 3: Q and S couple to form T. The total number of Br atoms in T is the sum from Q and S: 2 + 2 = 4.

Answer: 4

JEE Advanced · 2019 · 27 May 2019 · Paper 1 · Numerical answer

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