NEET UG CHEMISTRY MCQ: STATES OF MATTER

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Analyzing +4 | -1

Which of the following statements on critical constants of gases are correct?

I. Larger the

T_c / p_c

value of a gas, larger would be the excluded volume.

II. Critial temperature

\left(T_c\right)

of a gas is greater than its Boyle temperature

\left(T_B\right)

.
III. At the critial point in the van der Waals' gas isotherm.

\left(\frac{\partial p}{\partial V_m}\right)_{T_c}=0

Select the correct answer using the codes given below.

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Correct option: B

Both I and III

Option B (Both I and III) is correct because statement I correctly relates Tc/Pc to excluded volume, and statement III correctly describes the condition at the critical point.

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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?