JEE Main 2022 — Some Basic Concepts Of Chemistry Question with Solution

Initially,

Mass of CNG(CH₄) = 100 gm

$$\therefore$$ Moles of CH₄ = $$\frac{100}{16}$$ = 6.25 moles

Mass of O₂ = 208 gm

$$\therefore$$ Moles of O₂ = $$\frac{208}{32}$$ = 6.5 moles

From reaction you can see,

1 mole of CH₄ react with 2 mole of O₂

$$\therefore$$ 6.25 mole of CH₄ react with 6.25 $$\times$$ 2 = 12.5 moles of O₂

But here only 6.5 moles of O₂ present

So, O₂ will act as limiting reagent.

$$\therefore$$ Produced CO₂ will depends on moles of O₂.

From 2 moles of O₂ 1 mole of CO₂

$$\therefore$$ From 6.5 moles of O₂ $$\frac{6.5}{2}$$ moles of CO₂ produced.

$$\therefore$$ Weight of CO₂ = $$\frac{6.5}{2}$$ $$\times$$ 44 = 143 gm