What is the relationship between the two structures shown?

Choose the correct relation between $l_1$ and $l_2$ for the given allene derivative (butatriene system):

Identify the $R$ configuration.

The correct order of enol contents $x$,$y$,$z$ is

Which of the following molecules rotates the plane of plane-polarized light?

$X$ and $Y$ are optically active isomers having the molecular formula $C_5H_9Cl$. When treated with one mole of $H_2$,$X$ gets converted to an optically inactive compound $Z$,but $Y$ gives an optically active compound $P$. The structures of $X$ and $Y$ respectively are: