Question

35. In a gas there are two hydrogen atoms for each carbon atom. If the density of gas at NTP is 1.25g/L the molecular formula of the gas is (a) CH₂ (c) C₂H4 (b) CHA (d) None of these​

Answer 1

Answer:

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C2H4

PV=nRT

P=MdRT

M=11.25×0.082×273

=27.98

Molar mass ≡28 gram/mole

∴  as empirical formula =CH2

∴  emprical mass =12+2=14

n=1428=2

∴  Molecular formula =(CH2)2

=C2H4

Hence, the correct option is B

Answer 2

Answer :the correct option is C2H4