JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 25 July 2022, Shift 1, Chemistry Q64

Question 64 of 90 in this shift, Chemistry question 4 of 30, Section A.

20

mL of

0.1

\mathrm{NH_4OH}

is mixed with

40

mL of

0.05

M HCl. The pH of the mixture is nearest to : (Given :

K_b(\mathrm{NH_4OH})=1\times10^{-5}

\log2=0.30

\log3=0.48

\log5=0.69

\log7=0.84

\log11=1.04

)

(1) $3.2$
(2) $4.2$
(3) $5.2$ Official answer
(4) $6.2$

Official answer

Option 3

NTA final key (2022 Session 2).

Chapter: Equilibrium
Topic: pH and Buffers
Idea tested: pH of Salt Solutions

Same topic in other shifts

All pH and Buffers questions

2 Apr 2026, Shift 2 · Q52The first and second ionization constants of a weak dibasic acid $\mathrm{H_2A}$ are $8.1 \times 10^{-8}$ and $1.0 \times 10^{-13}$ …HardSingle correct
2 Apr 2026, Shift 2 · Q56At 25°C, 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the titration…MediumSingle correct
4 Apr 2026, Shift 1 · Q74The pH of a solution obtained by mixing $5$ mL of $0.1$ M $\mathrm{NH_4OH}$ solution with $250$ mL of $0.1$ M $\mathrm{NH_4Cl}$ solution…MediumNumerical value
4 Apr 2026, Shift 2 · Q5520 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing 20 mL of…EasySingle correct
5 Apr 2026, Shift 1 · Q56Arrange the following resultant mixtures in increasing order of their pH values A. 10 mL 0.2 M $\mathrm{Ca(OH)_2}$ + 25 mL 0.1 M HCl B. 10…MediumOther
6 Apr 2026, Shift 2 · Q56Given is a concentrated solution of a weak electrolyte $\mathrm{A_xB_y}$ of concentration 'c' and dissociation constant 'K'. The degree of…HardSingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.