Question

$0.833$ mole of a carbohydrate, with empirical formula $CH _{2} O$ has $10\, g$ of hydrogen. Molecular formula of carbohydrate is

• A. $C _{6} H _{12} O _{6}$
• B. $C _{3} H _{5} O _{3}$
• C. $C _{3} H _{10} O _{5}$
• D. $C _{3} H _{4} O _{3}$

Answer 1

Answer: (A)

$0.833\, mole$ of carbohydrate has hydrogen $=10 \,g$

$\therefore $ 1 mole of carbohydrate has hydrogen $=\frac{10}{0.833} \times 1=12$

$\therefore $ Molecular formula of hydrocarbon $= C _{6} H _{12} O _{6}$