At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of O2 for complete combustion, and 40 mL of…
Some Basic Concepts (Mole Concept) · Class 11 · JEE Main Previous Year Question
At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of for complete combustion, and 40 mL of is formed. The formula of the hydrocarbon is:
- a
- b
- c✓
- d
🧠 Volume ratios are coefficients (gases at same T, P) For gases under the same conditions, volume = mole. So fuel : : becomes in moles.
🗺️ Step by step For : .
From ratio: .
From ratio:
So the hydrocarbon is .
⚠️ Common mistake Don't compare to directly — they are both with respect to the of fuel. Always write coefficients per of hydrocarbon first.
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