On combustion of $Li$,$Na$,and $K$ in excess of air,the major oxides formed,respectively,are:

An electrolytic cell contains a solution of $Ag_2SO_4$ and has platinum electrodes. $A$ current is passed until $1.6 \ g$ of $O_2$ has been liberated at the anode. The amount of silver deposited at the cathode would be ............. $g$.

When a battery is connected across a resistor of $16 \Omega$,the voltage across the resistor is $12 \ V$. When the same battery is connected across a resistor of $10 \Omega$,the voltage across it is $11 \ V$. The internal resistance of the battery in ohm is

Which of the following species has no $p\pi - p\pi$ bond but has a bond order equal to that of $O_2$?

The true solution set of the inequality,$\sqrt{5x - 6 - x^2} + \frac{\pi}{2} \int_{0}^{x} dz > x \int_{0}^{\pi} \sin^2 x \, dx$ is :

The excess pressure in a soap bubble is thrice that in another one. Then the ratio of their volumes is: