Q.
In the Newman projection for $2,2$-dimethylbutane
$X$ and $Y$ can respectively be

IIT JEEIIT JEE 2010Hydrocarbons
Solution:
On $C_2-C_3 \, axis, \, X=CH_3,Y=CH_3 $
On $C_1-C_2 \, axis, \, X=H,Y=C_2H_5 $
