Question 4(ii)A gas cylinder of capacity 40 dm3 is filled with gas X the mass of which is 20 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of hydrogen is 2 g. Find the relative molecular mass of the gas.

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Accepted Answer

Vapour density of gas =Wt. of certain volume of gas Wt. of same volume of H2=202=10 g\dfrac{\text{Wt. of certain volume of gas }}{\text {Wt. of same volume of H}_2} \[0.5em] = \dfrac{20}{2} \[0.5em] = 10 \text{ g}Wt. of same volume of H2​Wt. of certain volume of gas ​=220​=10 gMolecular weight = 2 x Vapour density= 2 x 10 = 20 gHence, relative molecular mass of gas is 20 g

Solved 2024 Specimen Paper ICSE Class 10 Chemistry — Question 6

Question 4(ii)