What will be the pressure at $0\,^oC$ in Kolkata,Chennai,and Mumbai (in $,bar$)?

The total pressure exerted by a mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases. This is known as which law?

What is the density of water vapour at the boiling point of water?

$A$ gaseous mixture of $3$ gases $A$, $B$ and $C$ has a pressure of $10 \,atm$. The total number of moles is $10$. If the partial pressures of gases $A$ and $B$ are $3 \,atm$ and $1 \,atm$ respectively, and the molar mass of gas $C$ is $2 \,g/mol$, calculate the weight of $C$ in the mixture. (in $\,g$)

At $T \ K$,a gaseous mixture of $H_2$ and $O_2$ containing $20 \%$ (weight/weight) of $H_2$ exerts a total pressure of $2 \ bar$. What is the partial pressure of $O_2$ (in bar)?

When the temperature increases,the surface tension of water $......$