Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
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Q · Structure of the AtomMedium · 45s
Statement: For which pair of elements are isotopes found naturally? 1. Hydrogen 2. Carbon 3. Oxygen Select the correct answer:
TopicStructure of the Atom
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.
All have naturally occurring isotopes.
Final Answer: Option D - 1, 2 and 3