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Question

An organic compound contains carbon, hydrogen and oxygen. Its chemical analysis gave C,38.71% and H,9.67%. The empirical formula of compound would be

A
CH3O
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B
CH2O
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C
CHO2
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D
CHO
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Solution

The correct option is A CH3O
Percentage of Carbon=38.71
Percentage of Hydrogen=9.67
Total percentage =100 %
As the compound contains Carbon, hydrogen and oxygen only.
Then percentage of oxygen =10038.719.67=51.62
C:H:O=38.7112:9.671:51.6216
=3.225:9.67:3.226=1:3:1
Empirical formula =CH3O

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