Moles of Methane Required to Produce 11 g CO₂ – JEE Main PYQ

JEE Main Previous Year Question

Q. The number of moles of methane required to produce 11 g CO₂(g) after complete combustion is :

(Given molar mass of methane in g mol⁻¹ : 16)

A. 0.35

B. 0.25

C. 0.5

D. 0.75

Step 1: Write the balanced chemical equation

CH₄ + 2O₂ → CO₂ + 2H₂O

Step 2: Calculate moles of CO₂ produced

Given mass of CO₂ = 11 g
Molar mass of CO₂ = 44 g mol⁻¹
Moles of CO₂ = 11 / 44 = 0.25 mol

Step 3: Use mole ratio from equation

From the balanced equation:
1 mol CH₄ produces 1 mol CO₂

Step 4: Calculate moles of methane required

Moles of CH₄ required = moles of CO₂ produced
= 0.25 mol

Correct Answer: 0.25 mol