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Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctHardConceptual

JEE Main 25 July 2021, Shift 1, Physics Q13

Question 13 of 90 in this shift, Physics question 13 of 30, Section A.

For a gas CP−CV=RC_P-C_V=R in a state P and CP−CV=1.10 RC_P-C_V=1.10\,R in a state Q, TPT_P and TQT_Q are the temperatures in two different states P and Q respectively. Then
  1. (1)TP>TQT_P>T_QOfficial answer
  2. (2)TP<TQT_P<T_Q
  3. (3)TP=TQT_P=T_Q
  4. (4)TP=0.9 TQT_P=0.9\,T_Q

Official answer

Option 1

NTA final key.

Chapter
Thermodynamics
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.