JEE Main 2019 Chemistry question on Some Basic Concepts of Chemistry
The percentage composition of carbon by mole in methane is
A.
75%
B.
20%
C.
25%
D.
80%
Show answer and solution
Correct option: B
Solution
Methane is CH₄, which contains 1 carbon atom and 4 hydrogen atoms, giving a total of 5 atoms per molecule. The mole fraction of carbon = 1/5 = 0.20, so the percentage composition by mole is 20%.
[JEE Main 2019 · 8 Apr · Shift II]
Practise Some Basic Concepts of Chemistry the way it is asked
A timed set of real JEE Main Some Basic Concepts of Chemistry questions, graded as the exam grades. No sign-up.
