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Q.

0.765g of an organic compound on combustion gave 0.535 g CO2 and 0.138g of H2O. Then the

            ratio of the percentage of carbon and hydrogen is 19 : x. Then the value of x is ___ .

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a

2

b

8

c

12

d

4

answer is A.

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Detailed Solution

%C=1244×MassofCO2MassofO.C×100

=1244×0.535.765×100

=1244×0.6993

=19%

%H=218×MassofH2OMassofO.C×100

=218×0.1380.765×100

=011111×0.18×100

=2%

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0.765g of an organic compound on combustion gave 0.535 g CO2 and 0.138g of H2O. Then the            ratio of the percentage of carbon and hydrogen is 19 : x. Then the value of x is ___ .