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Q.

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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a

CH4

b

SO2

c

He

d

O2

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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