Solved PYQs 1-3 of 271: Organic Chemistry | CSIR (Council of Scientific & Industrial Research) Chemical Sciences | Chapter-wise | PYQ 2024

The ${\displaystyle {}^{1}H}$ NMR data corresponding to the labelled protons of the following compound is given below. The signal corresponding to ${\displaystyle H_b}$ is

${\displaystyle {}^{1}HNMR:\delta 4.19{\displaystyle (\mathrm{d}t,J=\mathrm{9.0,2.5}Hz)},4.13{\displaystyle (\mathrm{d}q,J=\mathrm{7.0,6.5}Hz)},3.35{\displaystyle (dd,J=\mathrm{18.0,9.0}Hz)},3.15{\displaystyle (dd,J=\mathrm{7.0,2.5}Hz)},3.08{\displaystyle (dd,J=\mathrm{18.0,9.0}Hz)}ppm}$

History

The chemical shifts of ${\displaystyle C{H}_3}$ and ${\displaystyle C{H}_2}$ protons in a molecule are 1.15 and 3.35 ppm, respectively. When the magnetic field is 2 T, the absolute difference between the local magnetic fields (in T) for these two protons is

History

The major product formed in the following reaction is?

History

A

B

C

D