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  • At constant Temperature, a gas is at Pressure 900 Mm Hg. The Pressure at which volume decrease by 30% is ---MM Hg ?Option: 1 1567 <p

At constant Temperature, a gas is at Pressure 900 Mm Hg. The Pressure at which volume decrease by 30% is ---MM Hg ?

Option: 1

1567

 


Option: 2

1285


Option: 3

1300


Option: 4

1385


Answers (1)

best_answer

\mathrm{From \ Boyle's \ Law \ P_2 v_2=P_1 v_1}

\mathrm{P_1=900 \mathrm{Mm} \mathrm{Hg}}

\mathrm{P_2={\text {pressure at which volume is }} Reduced \ by \ 30 \%}

\mathrm{v_2= \text { volume decrease by } 30 \%}

\mathrm{v_2=v_1-.3 v_1=.7 v_1}

\mathrm{\text { Then } P_2=\frac{900 \times v_1}{.7 v_1}}

\mathrm{\begin{aligned} & =1285 \cdot 71 \\ & \approx 1285 \mathrm{~mm} \mathrm{Hg} \end{aligned}}

Posted by

Kuldeep Maurya

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