$A$ neutral atom has $2, 8,$ and $7$ electrons in $K, L,$ and $M$ shells respectively. What is the total number of electrons in the $p$-orbitals?

Four capacitors marked with their capacitances and breakdown voltages are connected as shown in the figure. Find the maximum $EMF$ of the source such that no capacitor breaks down. (in $kV$)

$A$ carrier signal $60 \sin(2\pi \times 10^6 t)$ is used to modulate an audio signal $15 \sin(300\pi t)$. The depth of modulation is .........$\%$.

If $A$ is the areal velocity of a planet of mass $M$,its angular momentum is

In $YDSE$,the separation between the slits is halved and the distance between the slit and the screen is doubled. The fringe width is

Which one of the following reactions does not form a gaseous product?