Consider the following statements: For diatomic gases,the ratio $C_p/C_v$ is equal to:
$1$. $1.40$ (lower temperature)
$2$. $1.66$ (moderate temperature)
$3$. $1.29$ (higher temperature)
Which of the above statements are correct?

The total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases under the same conditions. This is known as:

Two gases $A$ and $B$ having the same volume diffuse through a porous partition in $20$ and $10$ seconds respectively. The molecular mass of $A$ is $49 \ u$. The molecular mass of $B$ will be .............. $u$.

Sulphur dioxide $(SO_2)$ and oxygen $(O_2)$ were allowed to diffuse through a porous partition. $20 \ dm^3$ of $SO_2$ diffuses through the porous partition in $60 \ seconds$. The volume of $O_2$ in $dm^3$ which diffuses under the similar conditions in $30 \ seconds$ will be (atomic mass of sulphur $= 32 \ u$)

On what factors does the force $F$ required to maintain the flow of layers in a liquid depend?

The total pressure of a mixture of non-reacting gases $X$ $(0.6 \ g)$ and $Y$ $(0.45 \ g)$ in a vessel is $740 \ mm$ of $Hg$. The partial pressure of the gas $X$ is $........ \ mm$ of $Hg$. (Nearest Integer) (Given: molar mass $X = 20 \ g \ mol^{-1}$ and $Y = 45 \ g \ mol^{-1}$)