Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
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Q · Matter and Its States Medium · 45s
A gas occupies 2 L at 1 atm pressure. What will be its volume at 0.5 atm, temperature constant?
TopicMatter and Its States
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
By Boyle’s Law: P₁V₁ = P₂V₂ → V₂ = P₁V₁ / P₂ = (1×2)/0.5 = 4 L.
Final Answer: Option C — 4 L