1.

Which of the following series of compounds have same mass percentage of carbon ?

Answer»

`CO_(2)`,CO
`CH_(4),C_(2)H_(6),C_(2)H_(2)`
`C_(2)H_(2),C_(6)H_(6),C_(10)H_(6)`
`HCHO,CH_(3)COOH,C_(6)H_(12)O_(6)`

Answer :D


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