The compressibility factor for an ideal gas is

Which of the following is Potash Alum?

Which of the following magnetic properties is exhibited by the compounds of alkaline earth metals?

If the equation for the angular displacement of a particle moving on a circular path is given by $\theta(t) = 2t^3 + 0.5$,where $\theta$ is in radians and $t$ is in seconds,then the angular velocity of the particle after $2 \, s$ from its start is ......... $rad/s$.

The solution of the differential equation $\frac{dy}{dx} = \frac{xy+y}{xy+x}$ is

Let $z = a - \frac{i}{2}$,where $a \in R$. Then $|i + z|^2 - |i - z|^2$ is equal to