2g of hydrogen is present in a closed vessel at S.T.P. If the same quantity of another gas 'x' when introduced into the vessel the pressure becomes 1.5 atm. The gas 'x' would be

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CH4

SO2

answer is C.

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Detailed Solution

P1n1=P2n2 ⇒11=0.52x 1=0.5×x2 x=4 g Molecular wt of 'x' gas=4 =He gas

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