Which of the following has the maximum boiling point?

The change in the value of $g$ at a height $h$ above the surface of the earth is the same as at a depth $d$ below the surface of the earth. When both $d$ and $h$ are much smaller than the radius of the earth,then which one of the following is correct?

Which of the following is incorrectly matched?

$(\sqrt{3}+i)^7+(\sqrt{3}-i)^7$ is equal to (in $\sqrt{3}$)

In the ground state,an element has $13$ electrons in the $M$ shell. The element is

If a complex number $z$ satisfies $|z^2-1|=|z|^2+1$,then $z$ lies on