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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 27 July 2022, Shift 2, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 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) :** Dissolved substances can be removed from a colloidal solution by diffusion through a parchment paper. **Reason (R) :** Particles in a true solution cannot pass through parchment paper but the colloidal particles can pass through the parchment paper. In the light of the above statements, choose the **correct** answer from the options given below :
  1. (1)Both **(A)** and **(R)** are correct and **(R)** is the correct explanation of **(A)**
  2. (2)Both **(A)** and **(R)** are correct but **(R)** is **not** the correct explanation of **(A)**
  3. (3)**(A)** is correct but **(R)** is not correctOfficial answer
  4. (4)**(A)** is not correct but **(R)** is correct

Official answer

Option 3

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Peptization and Dialysis

Same topic in other shifts

All Colloids questions
  1. 6 Apr 2023, Shift 2 · Q87The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ______________. Gem stones,…MediumNumerical value
  2. 8 Apr 2023, Shift 2 · Q87Coagulating value of the electrolytes AlCl3\mathrm{AlCl_3} and NaCl for As2S3\mathrm{As_2S_3} are 0.09 and 50.04 respectively. The coagulating…EasyNumerical value
  3. 10 Apr 2023, Shift 2 · Q63Ferric chloride is applied to stop bleeding because -EasySingle correct
  4. 13 Apr 2023, Shift 1 · Q63What happens when a lyophilic sol is added to a lyophobic sol?EasySingle correct
  5. 13 Apr 2023, Shift 2 · Q63Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The diameter of…MediumAssertion–reason
  6. 15 Apr 2023, Shift 1 · Q8620 mL of 0.5 M NaCl is required to coagulate 200 mL of As2S3\mathrm{As_2S_3} solution in 2 hours. The coagulating value of NaCl is __________.EasyNumerical value

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.