List of top Questions asked in WBJEE- 2016

If the equation $x^2 + y^2 -10x + 21 = 0$ has real roots $x = a$ and $y=\beta$ then

The maximum number of 2p electrons with electronic spin $=-\frac{1}{2}$ are

For $N^{3-} >O^{2-}>F^{-} and Na^{+},$ the order in which their ionic radii varies is

Which of the following is the correct option for free expansion of an ideal gas under adiabatic condition?