NEET UG CHEMISTRY MCQ: STATES OF MATTER

1 Hard

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Analyzing +4 | -1

Statement I: Second virial coefficient of

\mathrm{CO}_2

-0.065 \mathrm{~L} \mathrm{~mol}^{-1}

400 \mathrm{~K}

and

30 \mathrm{~atm}

making

\mathrm{CO}_2

more compressible than an ideal gas.

Statement II: Compressibility factor of

\mathrm{CO}_2(Z=0.941)

is less than 1 (

Z=1

for ideal gas) due to the attractive forces between

\mathrm{CO}_2

molecules.

View answer and explanation

Correct option: A

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Option A is correct. Statement I is correct because a negative second virial coefficient indicates higher compressibility. Statement II is correct because Z < 1 indicates attractive forces.

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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?