NEET UG CHEMISTRY MCQ: STATES OF MATTER

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A: Hot air balloon rises up by displacing the denser air of the atmosphere.
R: The given mass of a gas becomes less denser.

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Correct option: A

If both A and R are correct and R is the correct explanation of A

Option A (If both A and R are correct and R is the correct explanation of A) is correct because hot air balloons rise due to the hot air being less dense than the surrounding cooler air, which is exactly what the reason states.

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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?