The calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is

Consider telecommunication through optical fibres. Which of the following statements is $NOT$ true?

$A$ mercury drop of radius $1 ~cm$ is sprayed into $10^6$ drops of equal size. The energy expended in joules is (Surface tension of mercury is $460 \times 10^{-3} ~N/m$)

In an elastic collision of two particles,which of the following is conserved?

What is the female reproductive organ in mosses called?

The integral $\int \frac{3x^{13} + 2x^{11}}{(2x^4 + 3x^2 + 1)^4} dx$ is equal to (where $C$ is a constant of integration)