NEET UG CHEMISTRY MCQ: STATES OF MATTER

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2 \mathrm{~g}

of gas

{A}

introduced in a evacuated flask at

25^{\circ} \mathrm{C}

. The pressure of the gas is

1 \mathrm{~atm}

. Now

3 \mathrm{~g}

of another gas

B

is introduced in the same flask so total pressure becomes

1.5 \mathrm{~atm}

. The ratio of molecular mass of

A

and

B

View answer and explanation

Correct option: B

\frac{1}{3}

Option B (

\frac{1}{3}

) is correct because the ratio of molecular masses can be found by comparing the partial pressures and masses of the two gases using the ideal gas law.

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If for the gases, the critical temperatures are mentioned below i.e.

\begin{array}{cccccccccccccccccccc} {\underline {{\text{Gas}}} }&{\underline {\,{\text{Critical}}\,\,{\text{temperature}}} } \\ {\text{A}}&{{T_{{C_1}}}} \\ {\text{B}}&{{T_{{C_2}}}} \\ {\text{C}}&{{T_{{C_3}}}} \\ {\text{D}}&{{T_{{C_4}}}} \end{array}

{T_{{C_1}}} > {T_{{C_2}}} > {T_{{C_3}}} > {T_{{C_4}}}

Which of the following can be predicted Which of the following statements is incorrect? Among the following metals interatomic forces are probably weakest in: The interaction energy of London forces between two particles is proportional to

{r^x}

, where

r

is the distance between the particles. The value of

x

is In deriving the kinetic equation we make use of the root mean square speed of the molecules which is: Which force is strongest?