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Question

The weight percentage of carbon in carbon dioxide and carbon disulphide is 27.27% and 15.79% respectively. What is the ratio of S and O that can combine with same weight of carbon?

A
2:1
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B
1:2
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C
1:1
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D
1:3
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Solution

The correct option is A 2:1
In CO2 27.27% C and 72.73% of O is present
Weight of oxygen that combines with 1 g of carbon = 72.7327.27=2.67 g
In CS2 15.79% C and 84.03% of S is present
Weight of sulphur that combines with 1 g of carbon =84.2115.79=5.33 g
Ratio of weights of S and O that can combine with same weight of carbon is 5.33:2.67=2:1

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