Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · Matter and Its States Medium · 45s
Which of the following shows expansion on freezing?
TopicMatter and Its States
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
← Previous questionQ 30 / 30
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Water expands when it freezes due to its open hexagonal structure in ice.
Final Answer: Option A — Water