The simplest amino acid is .......

Which of the following represents the correct pathway of blood circulation in the human heart?

The bond angle and hybridization in ether $(CH_3OCH_3)$ is

Which of the following does not contain any co-ordinate bond?

$A$ bomb moving with velocity $(40 \hat{i} + 50 \hat{j} - 25 \hat{k}) \text{ m/s}$ explodes into two pieces of mass ratio $1:4$. After the explosion,the smaller piece moves away with velocity $(200 \hat{i} + 70 \hat{j} + 15 \hat{k}) \text{ m/s}$. The velocity of the larger piece after the explosion is: