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Properties of CO2

In the table ...

Question

In the table below, which one of the following has least weight of oxygen?
No. Compound (Mol. wt.) Weight (in g)
I $C O_{2}$ (44) 4.4
II $N O_{2}$ (46) 2.3
III $H_{2} O_{2}$ (34) 6.8
IV $S O_{2}$ (64) 1.6

IV only

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I & III

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I & II

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II & IV

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Solution

The correct option is A IV only
(I) 4.4 g (0.1 mole) of carbon dioxide contains 3.2 g (0.2 mole) of oxygen.
(II) 2.3 g (0.05 mole) of carbon dioxide contains 1.6 g (0.1 mole) of oxygen.
(III) 6.8 g (0.2 mole) of carbon dioxide contains 6.4 g (0.4 mole) of oxygen.
(IV) 1.6 g (0.025 mole) of carbon dioxide contains 0.8 g (0.05 mole) of oxygen. It contains least weight of oxygen.

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