The masses of carbon, hydrogen and oxygen in an organic compound are in the ratio 6 : 1 : 8 respectively. Which of the following pairs of formulae correspond to above information?

Options

A. `CH_(2)O` and `CH_(3)CHO`
B. `CH_(2)O` and `C_(3)H_(6)O`
C. `C_(2)H_(6)O` and `C_(2)H_(6)O_(2)`
D. `C_(3)H_(6)O_(3)` and HCHO

Answer

D

Explanation

In `C_(3)H_(6)O_(3)`, mass of 3 `"C-atom"=12 xx 3 = 36`
`"mass of 6-H-atoms"= 1 xx 6=6`
`"mass of 3 O-atom"=16 xx 3 = 48`
`:.` Ratio of masses of C : H : O is 36 : 6 : 48 or 6 : 1 : 8.
In HCHO, mass of 1C-atom = 12
mass of 2 H-atoms=2
mass of 1 O-atom=16
`:.` Ratio of masses of C : H : O is 12 : 2 : 16 or 6 : 1 : 8