Q38. The correct stability order of the following resonance structures of $\mathrm { CH } _ { 3 } - \mathrm { CH } = \mathrm { CH } - \mathrm { CHO }$ is $\mathrm { CH } _ { 3 } - \stackrel { \ominus } { \mathrm { CH } } - \mathrm { CH } = \stackrel { \mathrm { O } } { \mathrm { C } } - \mathrm { H } \leftrightarrow$ I $\mathrm { CH } _ { 3 } - \stackrel { \oplus } { \mathrm { CH } } - \mathrm { CH } = \mathrm { O } : \Theta - \mathrm { C } - \mathrm { H } \leftrightarrow$ II [Figure] III (1) I $>$ II $>$ III (2) II $>$ III $>$ I (3) II $>$ I $>$ III (4) III $>$ II $>$ I Q39. [Figure] Total number of stereo isomers possible for the given structure : (1) 2 (2) 4 (3) 3 (4) 8
Q38. The correct stability order of the following resonance structures of $\mathrm { CH } _ { 3 } - \mathrm { CH } = \mathrm { CH } - \mathrm { CHO }$ is\\
$\mathrm { CH } _ { 3 } - \stackrel { \ominus } { \mathrm { CH } } - \mathrm { CH } = \stackrel { \mathrm { O } } { \mathrm { C } } - \mathrm { H } \leftrightarrow$\\
I\\
$\mathrm { CH } _ { 3 } - \stackrel { \oplus } { \mathrm { CH } } - \mathrm { CH } = \mathrm { O } : \Theta - \mathrm { C } - \mathrm { H } \leftrightarrow$\\
II\\
\includegraphics[alt={}]{smile-0ed87c6ca63a783cc1e0e15af41057bd7c0aa95b}\\
III\\
(1) I $>$ II $>$ III\\
(2) II $>$ III $>$ I\\
(3) II $>$ I $>$ III\\
(4) III $>$ II $>$ I
Q39.\\
\includegraphics[alt={}]{smile-c3796a3ed0278e820fe038b3b9578e9fdb0c9996}
Total number of stereo isomers possible for the given structure :\\
(1) 2\\
(2) 4\\
(3) 3\\
(4) 8