NEET UG CHEMISTRY MCQ: STATES OF MATTER

1 Medium

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Analyzing +4 | -1

(A):

22.4 \mathrm{~L}

\mathrm{N}_2

at STP and

5.6 \mathrm{~L} \mathrm{~O}_2

at STP contain equal number of molecules.
(R): Under similar conditions of temperature and pressure all gases contain equal number of atoms.

View answer and explanation

Correct option: D

Both (A) and (R) are false

Option D is correct because both the assertion and the reason are false. 22.4 L of N2 and 5.6 L of O2 at STP do not contain an equal number of molecules, and under similar conditions, gases contain equal numbers of *molecules*, not necessarily atoms.

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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?