Verified Solution • 2025–26 Session moderate

QJEEM20Ch1d63: JEE Main 2020 Chemistry - Class 11 JEEM20Ch1d63 Solution: Arrange the following solutions in the decreasing order of pOH…

Arrange the following solutions in the decreasing order of pOH :

(A) 0.01 M HCl
(B) 0.01 M NaOH
(C) 0.01 M CH3COONa
(D) 0.01 M NaCl

Multiple Choice Options

  • A (B) > (C) > (D) > (A)
  • B (A) > (D) > (C) > (B)
  • C (A) > (C) > (D) > (B)
  • D (B) > (D) > (C) > (A)

Step-by-Step Verified Solution

(A) 10–2 M HCl ⇒ [H+] = 10–2 M ⇒ pH = 2 ⇒ pOH = 14 - 2 = 12
(B) 10–2 M NaOH ⇒ [OH–] = 10–2 M ⇒ pOH = 2
(C) 10–2 M CH3COO–Na+ ⇒ [OH+] > 10–7 ⇒ pOH < 7
(D) 10–2 M NaCl ⇒ Neutral pOH = 7

Order of pOH value A > D > C > B

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