NEET UG CHEMISTRY MCQ: STATES OF MATTER

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A given mass of helium at STP is allowed to expand to 1.4 times its initial volume by changing the temperature and pressure, then its resultant density would be

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Correct option: C

0.13 \mathrm{~kg} \mathrm{~m}^{-3}

The correct answer is

0.13 \mathrm{~kg} \mathrm{~m}^{-3}

. The density is inversely proportional to the volume when the mass is constant. Since the volume increases by a factor of 1.4, the density decreases by a factor of 1.4.

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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?