The pair of species having different percentage (by mass) of carbon is :

C H_{3} C O O H

and

C_{6} H_{12} O_{6}

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C H_{3} C O O H

and

C_{2} H_{5} O H

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H C O O C H_{3}

and

H C O O H

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C_{2} H_{5} O H

and

C H_{3} O C H_{3}

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Solution

The correct options are
A $C H_{3} C O O H$ and $C_{2} H_{5} O H$
C $H C O O C H_{3}$ and $H C O O H$
Empirical formula of both $C H_{3} C O O H$ and $C_{6} H_{12} O_{6}$ are $C H_{2} O$ , so percentage (mass) of carbon is same.
Similarly, empirical formula of both $C_{2} H_{5} O H$ and $C H_{3} O C H_{3}$ are same, so percentage (mass) of carbon is same.
But, as empirical formula is different in B & C, so percentage (mass) of carbon is different.

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Similar questions

Complete the following equations and write the names of the products formed.
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