Which of the following is the simplest amino acid?

The magnifying power of a simple microscope is (when the final image is formed at $D = 25 \ cm$ from the eye):

Two bodies of masses $0.1 \,kg$ and $0.4 \,kg$ move towards each other with the velocities $1 \,m/s$ and $0.1 \,m/s$ respectively. After collision,they stick together. In $10 \,s$,the combined mass travels .......... $m$.

Which of the following organs is known as the 'blood bank' of the human body?

The correct order of the $O-O$ bond length in $O_2$,$H_2O_2$ and $O_3$ is

The number of rational terms in the expansion of $(3^{1/4} + 7^{1/6})^{144}$ is