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Question

10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature contain the same number of molecules.
The gas X is

A
CO
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B
CO2
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C
H2
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D
NO
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Solution

The correct option is A CO

If same volume is occupied by the gas, the no. of molecules are same, so no. of moles are same.
1 mole of gas N2 =2×14=28 gm

1 mole of CO gas =12+16=28 gm


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