JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 3 April 2025, Shift 1, Physics Q33

Question 33 of 75 in this shift, Physics question 8 of 25, Section A.

During the melting of a slab of ice at 273 K at atmospheric pressure:

(1)Positive work is done on the ice-water system by the atmosphere.Official answer
(2)Positive work is done by the ice-water system on the atmosphere.
(3)Internal energy of ice-water system remains unchanged.
(4)Internal energy of the ice-water system decreases.

Official answer

Option 1

NTA final key.

Chapter: Thermodynamics
Topic: Calorimetry
Idea tested: Volume Change on Melting

Same topic in other shifts

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.