The solubility of noble gases in water is fairly high due to

Which of the following gas is/are called rare gas?

Which statements among the following are correct about Helium?
$(i)$ Liquid helium is used to sustain powerful superconducting magnets.
$(ii)$ Liquid helium is useful to carry low temperature experiments.
$(iii)$ It is a heavy gas.
$(iv)$ It is a flammable gas.

In the clathrates of $Xe$ with water,the nature of bonding between $Xe$ and water molecule is

Argon is used:

Which of the following chemical reactions of xenon is $NOT$ correct?