Which of the following national parks is not a habitat for tigers?

$A$ man is standing on a balance and his weight is measured. If he takes a step to the left side,then his weight:

At higher altitude,the boiling point of water is $95\, ^oC$. The amount of $NaCl$ added to $1\, kg$ of water $(K_b = 0.52\, K\, kg\, mol^{-1})$ in order to raise the boiling point of the solution to $100\, ^oC$ (assuming $90\%$ ionization of $NaCl$) is .......... $g$.

Under the influence of a uniform magnetic field,a charged particle is moving in a circle of radius $R$ with constant speed $v$. The time period of the motion

What is the alum used for the purification of water?

What is the correct order of occurrence ($\%$ by weight) in air of $Ne, Ar$ and $Kr$?