NEET UG CHEMISTRY MCQ: STATES OF MATTER

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Oxygen gas generated by the decomposition of potassium chlorate is collected. The volume of oxygen collected at

24\,^\circ C

and atmospheric pressure of 760 mm Hg is 128 mL. Calculated the mass of oxygen gas obtained. The pressure of the water vapour at

24\,^\circ C

is 22.4 mm Hg

View answer and explanation

Correct option: B

0.163\mathrm{ }\,g

Option B is correct because, using the ideal gas law and accounting for the water vapor pressure, the mass of oxygen gas is calculated to be approximately 0.163 g.

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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}}}

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