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Question

Which of the following has the maximum number of atoms?

A
56 litres of SO2
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B
44.8 litres of NH3
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C
33.6 litres of CH4
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D
56 litres of CO
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Solution

The correct option is B 44.8 litres of NH3
1 mole of any gas occupies 22.4L volume.
Number of moles in 56L SO2=5622.4=2.5mole
SO2 has 3 atoms per molecule.
Number of atoms in molecule=3×2.5=7.5moles

Number of moles in 44.8L NH3=44.822.4=2mole
NH3 has 4 atoms per molecule.
Number of atoms in molecule=4×2=8moles

Number of moles in 33.6L CH4=33.622.4=1.5mole
CH4 has 5 atoms per molecule.
Number of atoms in molecule=5×1.5=7.5moles

Number of moles in 56L CO=5622.4=2.5mole
CO has 2 atoms per molecule.
Number of atoms in molecule=2×2.5=5moles

Therefore maximum atoms are present in 44.8L of NH3



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