Atoms and Molecules · UPSC CDS/OTA · Question 30 of 30

Atoms and Molecules – Question 30

Step-by-step solution. Atoms and Molecules for UPSC CDS/OTA.

Topic
Atoms and Molecules
Subject
General Studies
Difficulty
Medium
Solve Time
45–60 sec

Solved UPSC CDS/OTA Question

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Q · Atoms and MoleculesMedium · 45s

If 2 moles of O₂ react with 2 moles of H₂, how many moles of H₂O are formed?

TopicAtoms and Molecules
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.

Balanced: 2H₂ + O₂ → 2H₂O.

Final Answer: Option B — 2
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Atoms and Molecules Question 30 – UPSC CDS/OTA