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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceTwo statementsMediumConceptual

JEE Main 4 August 2021, Shift 2, Physics Q13

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

Given below are two statements : Statement I : Second law of thermodynamics is derived from the fact that it is impossible to run an irreversible engine without aid of external agency. Statement II : Second law of thermodynamics provides the concept of entropy. In the light of above statements choose the most appropriate answer from the options given below -
  1. (1)Both statement I and II are correct.Official answer
  2. (2)Both statements I and II are incorrect.
  3. (3)Statement I is correct but statement II is incorrect.
  4. (4)Statement I is incorrect but statement II is correct.

Official answer

Option 1

NTA final key.

Chapter
Thermodynamics
Topic
Second Law and Entropy
Idea tested
Second Law Statements

Same topic in other shifts

All Second Law and Entropy questions
  1. 26 Jun 2022, Shift 2 · Q55A heat engine operates with the cold reservoir at temperature 324 K. The minimum temperature of the hot reservoir, if the heat engine…MediumNumerical value
  2. 27 Jun 2022, Shift 1 · Q51In a carnot engine, the temperature of reservoir is 527∘527^\circC and that of sink is 200 K. If the workdone by the engine when it…EasyNumerical value
  3. 18 Mar 2021, Shift 2 · Q11An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S1S_1 and that of the other part is…EasySingle correct

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 108 of the 174 JEE Main shifts held from 2017 to 2026.