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
Which of the following can exhibit superfluidity?
TopicMatter and Its States
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
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Helium-4 below its lambda point exhibits superfluidity — a state with zero viscosity.
Final Answer: Option B — Helium-4 below 2.17 K