0.5 g of hydrocarbon gave 0.9 g water on combustion The percentage of carbon in hydrocarbon is

Question

0.5 g of hydrocarbon gave 0.9 g water on combustion The percentage of carbon in hydrocarbon is (A) 75.8 (B) 80.0 (C) 56.6 (D) 28.6

Tardigrade Admin · Accepted Answer

% of of H=(2/18) × ( textwt.of H2O/ textwt. of organic compound) × 100 =(2/18)× (0.9/0.5)× 100 =20 % Since percentage of hydrogen is 20 Therefore, remaining is carbon i.e. 80 %

Q. $0.5 g$ of hydrocarbon gave $0.9 g$ water on combustion The percentage of carbon in hydrocarbon is

$75.8$

$80.0$

$56.6$

$28.6$

% of of $H = \frac{2}{18} \times \frac{wt.of H _{2} O}{wt. of organic compound} \times 100$
$= \frac{2}{18} \times \frac{0.9}{0.5} \times 100$
$= 20%$
Since percentage of hydrogen is 20 Therefore, remaining is carbon i.e. $80%$

Q. 0.5g of hydrocarbon gave 0.9g water on combustion The percentage of carbon in hydrocarbon is

75.8

80.0

56.6

28.6