Which of the following compounds on oxidation gives methyl ethyl ketone?

The acceleration of a moving body can be found from

The modern man differs from the apes in

Which two orbitals are located along the axis and not between the axis?

$A$ cannon shell fired breaks into two equal parts at its highest point. One part retraces its path to the cannon with kinetic energy $E_1$,and the kinetic energy of the second part is $E_2$. The relation between $E_1$ and $E_2$ is:

Which of the following absorbs light energy during photosynthesis?