Thank you for reporting, we will resolve it shortly
Q.
$0.5\, mole$ of each of $H_2, SO_2$ and $CH_4$ are kept in a container. A hole was made in the container. After $3$ hours, the order of partial pressures in the container will be
Rate of diffusion $\propto \frac{1}{\sqrt{\text { molecular mass }}}$
$\therefore $ Order of diffusion $: H _{2}> CH _{4}> SO _{2}$
and amount left is in the order $SO _{2}> CH _{4}> H _{2}$
Hence, order of partial pressure is $p SO _{2}>p CH _{4}> pH _{2}$