Q21 / 118 · NTA Abhyas (NEET) 2020 · Chemistry · States of Matter

An L.P.G. cylinder contains 15 kg of butane gas at 27°C and 10 atmospheric pressure. It was leaking and its pressure fell down to 8 atmospheric pressure after one day. The gas leaked is

  • A
    1 kg
  • B
    2 kg
  • Correct answer
    C
    3 kg
  • D
    4 kg

Solution

From ideal gas equation, PV=nRT
V∝n (Hence V and T are constant)
and further, number of mol of gas (n) ∝ weight of the gas (w)
So P1P2=w1w2
or 10atm8atm=15kgx
or x = 12 kg
Hence, the gas leaked = 15 – 12 = 3 kg.

Hence, the correct answer is option: 'C'.

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