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JEE Main 20198 AprilEvening Shift

Exam: JEE Main
Year: 2019
Date: 8 April
Shift: Evening Shift
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

JEE Main 2019 · 8 April · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

The percentage composition of carbon by mole in methane is:

The percentage composition of carbon by mole in methane is:

Options

A $75%$
B $20%$
C $80%$
D $25%$

Correct answer

B. $20%$

Step-by-step solution

Chemical Formula of Methane is ${CH}_{4}$ .

The mole percentage of carbon $\text{=}\dfrac{molesofcarbon}{TotalmolesinMethane} \times 100$

$= \dfrac{1}{1 + 4} \times 100$

$= 20%$

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