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NEET 2022
Exam
NEET
Year
2022
Subject
Chemistry
Chapter
States of Matter

NEET 2022 · Chemistry · States of Matter

A 10 . 0L flask contains 64g of oxygen at 27 ° C . (Assume O _ 2...

A 10.0L10 . 0L flask contains 64g64g of oxygen at 27°C27 ° C. (Assume O2{O}_{2} gas is behaving ideally). The pressure inside the flask in bar is

(Given R=0.0831LbarK−1mol−1R = 0 . 0831Lbar{K}^{- 1}{mol}^{- 1})

Options

  1. A498.6498 . 6
  2. B49.849 . 8
  3. C4.94 . 9
  4. D2.52 . 5

Correct answer

C. 4.94 . 9

Step-by-step solution

From the ideal gas equation,

P=nRTVP=pressureofoxygenV=VolumeofoxygenT=temperatureofoxygeninKn=NumberofmolesofoxygengasP = \dfrac{nRT}{V}P = pressureofoxygenV = VolumeofoxygenT = temperatureofoxygeninKn = Numberofmolesofoxygengas

n=6432=2n = \dfrac{64}{32} = 2

P=2×0.0831×30010=4.986barP = \dfrac{2 \times 0 . 0831 \times 300}{10} = 4 . 986bar

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