The number of angular and radial nodes of $4d$ orbital respectively are

Two stars of masses $M$ and $2M$ are at a distance $d$ apart and are revolving around their common center of mass. The angular velocity of the system of two stars is ($G$ is the universal gravitational constant):

When $CO_2$ concentration in blood increases,breathing becomes

In a circuit,the current lags behind the voltage by a phase difference of $\pi / 2$. The circuit contains which of the following?

Number of moles of $MnO_4^-$ required to oxidize one mole of ferrous oxalate completely in acidic medium will be .............. $moles$.

$A$ ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and each one is equal to $3/4$th the angle of the prism. The angle of deviation is (in $^{\circ}$)