NEET UG CHEMISTRY MCQ: STATES OF MATTER

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Amongst

N{H_3},P{H_3},As{H_3}

and

Sb{H_3}

the one with highest B.P is

View answer and explanation

Correct option: B

Sb{H_3}

because of higher molecular weight

Option B (

Sb{H_3}

because of higher molecular weight) is correct because as the molecular weight increases down the group, the strength of the London dispersion forces increases, leading to a higher boiling point.

NH_3

has hydrogen bonding which would normally make it have the highest boiling point, but SbH3 has a significantly higher molecular weight which overcomes the hydrogen bonding in NH3.

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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?