(B) The mass of $H_2O$ produced is $0.9 \ g$. The mass of hydrogen in $0.9 \ g$ of $H_2O$ is calculated as: $\text{Mass of } H = \frac{2}{18} \times 0

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(B) The mass of $H_2O$ produced is $0.9 \ g$. The mass of hydrogen in $0.9 \ g$ of $H_2O$ is calculated as: $\text{Mass of } H = \frac{2}{18} \times 0.9 \ g = 0.1 \ g$. The percentage of hydrogen in the hydrocarbon is: $\frac{0.1 \ g}{0.5 \ g} \times 100 = 20 \%$. Since the compound is a hydrocarbon (containing only carbon and hydrogen),the percentage of carbon is $100 \% - 20 \% = 80 \%$. Therefore,the correct option is $B$.

Class 11 Chemistry Some Basic Concepts of Chemistry Percentage composition and Molecular formula

Medium

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

A
$75.8$
B
$80$
C
$56.6$
D
$28.6$

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Chemistry Questions

Chapter

Some Basic Concepts of Chemistry

Subtopic

Percentage composition and Molecular formula

If two compounds have the same empirical formula but different molecular formulae,they must have:

MediumIIT 1987

View Solution

An organic compound contains carbon,hydrogen,and oxygen. Its elemental analysis gave $C = 38.71 \%$ and $H = 9.67 \%$. The empirical formula of the compound would be:

DifficultAIPMT 2008

View Solution

Complete combustion of $0.858 \ g$ of compound $X$ gives $2.63 \ g$ of $CO_2$ and $1.28 \ g$ of $H_2O$. The lowest molecular mass $X$ can have is ............ $g$.

Difficult

View Solution

An oxide of iron contains $69.9\%$ iron. Its empirical formula is: (Given: Molar mass of $Fe$ and $O$ are $56$ and $16 \text{ g mol}^{-1}$ respectively.)

DifficultJEE MAIN 2026

View Solution

$A$ carbohydrate with the empirical formula $CH_2O$ contains $1 \ g$ of hydrogen in $0.1 \ mol$ of the compound. Determine the molecular formula of the carbohydrate.

Medium

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

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

Similar Questions

If two compounds have the same empirical formula but different molecular formulae,they must have:

An organic compound contains carbon,hydrogen,and oxygen. Its elemental analysis gave $C = 38.71 \%$ and $H = 9.67 \%$. The empirical formula of the compound would be:

Complete combustion of $0.858 \ g$ of compound $X$ gives $2.63 \ g$ of $CO_2$ and $1.28 \ g$ of $H_2O$. The lowest molecular mass $X$ can have is ............ $g$.

An oxide of iron contains $69.9\%$ iron. Its empirical formula is: (Given: Molar mass of $Fe$ and $O$ are $56$ and $16 \text{ g mol}^{-1}$ respectively.)

$A$ carbohydrate with the empirical formula $CH_2O$ contains $1 \ g$ of hydrogen in $0.1 \ mol$ of the compound. Determine the molecular formula of the carbohydrate.

Vedclass Test Series

Exam Paper Generator

Online Exam Module