NEET UG CHEMISTRY MCQ: STATES OF MATTER

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Analyzing +4 | -1

The behavior of a real gas is usually depicted by plotting compressibility factor

Z

versus

P

at a constant temperature. At high temperature and high pressure,

Z

is usually more than one. This fact can be explained by van der Waals equation when

View answer and explanation

Correct option: A

the constant '

a

' is negligible and not '

b

Option A (the constant '

a

' is negligible and not '

b

') is correct because at high temperature and high pressure, the volume is smaller, and the repulsive forces (represented by 'b') become more significant, while attractive forces ('a') become less important.

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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?