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If 0.2 gram of an organic compound conta...

If 0.2 gram of an organic compound containing carbon, hydrogen and oxygen on combustion, yielded 0.147 gram carbon dioxide and 0.12 gram water, what will be the content of oxygen in substance?

A

` 83.23%`

B

`78.45% `

C

`73.29%`

D

`89.50%`

Text Solution

Verified by Experts

The correct Answer is:
C
Organic compound ` +O_2 to underset(0.12 g) (H_2 O ) + underset( 0.147 g) (CO_2) ` + heat
Percentage of carbon `= (12)/(44 ) xx (" mass of" CO_2)/( " mass of compound ") xx 100`
`=( 12 )/(44) xx ( 0.147 )/( 0.2 ) xx 100 = 20.04% `
Percentage of Hydrogen =`(2)/(18 ) xx ( " mass of "H_2 O )/(" mass of compound ") xx 100`
`= ( 2)/(18 ) xx (0.12 )/(0.2 ) xx 100 = 6.67 % `
Percentage of oxygen `= 100 --(6,67 + 20.04) = 73.29%`
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