Learn

Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceAssertion–reasonEasyConceptual

JEE Main 29 July 2022, Shift 1, Physics Q37

Question 37 of 90 in this shift, Physics question 7 of 30, Section A.

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Clothes containing oil or grease stains cannot be cleaned by water wash. Reason (R) : Because the angle of contact between the oil/grease and water is obtuse. In the light of the above statements, choose the correct answer from the option given below.
  1. (1)Both (A) and (R) are true and (R) is the correct explanation of (A)Official answer
  2. (2)Both (A) and (R) are true but (R) is not the correct explanation of (A)
  3. (3)(A) is true but (R) is false
  4. (4)(A) is false but (R) is true

Official answer

Option 1

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Surface Tension
Idea tested
Angle of Contact

Same idea in other shifts

Asked 2× in all
  1. 4 Apr 2024, Shift 2 · Q38Given below are two statements : Statement I : The contact angle between a solid and a liquid is a property of the material of the solid…MediumTwo statements

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.