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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceTwo statementsEasyConceptual

JEE Main 27 January 2024, Shift 1, Chemistry Q63

Question 63 of 90 in this shift, Chemistry question 3 of 30, Section A.

Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic. Statement (II) : Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on Ka\mathrm{K_a} and Kb\mathrm{K_b} value of acid and the base forming it. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both Statement I and Statement II are correctOfficial answer
  2. (2)Both Statement I and Statement 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
Equilibrium
Topic
pH and Buffers
Idea tested
pH of Weak Acid-Weak Base Salts

Same idea in other shifts

Asked 4× in all
  1. 1 Feb 2024, Shift 1 · Q83Ka\mathrm{K_a} for CH3COOH\mathrm{CH_3COOH} is 1.8×10−51.8\times10^{-5} and Kb\mathrm{K_b} for NH4OH\mathrm{NH_4OH} is 1.8×10−51.8\times10^{-5}. The pH of…EasyNumerical value
  2. 26 Feb 2021, Shift 2 · Q56The pH of ammonium phosphate solution, if pkapk_a of phosphoric acid and pkbpk_b of ammonium hydroxide are 5.23 and 4.75 respectively, is…HardNumerical value
  3. 2 Apr 2017 (offline) · Q40pKapK_a of a weak acid (HA) and pKbpK_b of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution 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.