During the change of $O_2$ to $O_2^-$ ion,the electron adds to which one of the following orbitals?

The principle of controlled chain reaction is used in

Select the taxon mentioned that represents both marine and fresh water species.

Which of the following is true for carbon suboxide $C_3O_2$?

If the temperature of the sun were to increase from $T$ to $2T$ and its radius from $R$ to $2R$,then the ratio of the radiant energy received on Earth to what it was previously will be

If the volume of a parallelepiped with coterminous edges $4 \hat{i} + 5 \hat{j} + \hat{k}$,$-\hat{j} + \hat{k}$,and $3 \hat{i} + 9 \hat{j} + p \hat{k}$ is $34$ cubic units,then $p$ is equal to: