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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
States of Matter

NTA Abhyas 2020 · Chemistry · States of Matter

To an evacuated vessel with movable piston under external pressure...

To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm. at 0°C0 ° C ) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0°C0 ° C is close to

Correct answer

7

Step-by-step solution

PHe=1−0.68=0.32atm,n=0.1{P}_{He} = 1 - 0.68 = 0.32atm, n = 0.1

V=nRTP=0.1×0.0821×2730.32=7V = \dfrac{nRT}{P} = \dfrac{0.1 \times 0.0821 \times 273}{0.32} = 7
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