Find out the correct order of repulsive interaction of electron pairs in the following systems.

(I) Lone pair - lone pair

(II) Lone pair- bond pair

(III) Bond pair-bond pair

Equal amounts of two gases of molecular weights 4 and 40 are mixed. The pressure of the mixture is 1.1 atm . What will be the partial pressure of the lighter gas in the mixture?

Which of the curve ( $Z v s p$ ) will be followed by a real gas?

How much volume of 1 N aqueous solution of $\mathrm{H}_2 \mathrm{SO}_4$ should be taken, which will contain 0.2 moles of $\mathrm{H}_2 \mathrm{SO}_4$ ?