Match the column: Column-IColumn-IITitrations Best Indicator (with its pH range) to detect end point(a)Titration of 0.1 M H2SO4 by adding 0.1 M KOH(p)Methyl red (4.2 – 6.3)(b)Titration of 0.5 M HCOOH (pKa = 3.74) by adding 0.125 M NaOH(q)Phenol red (6.8 – 8.2)(c)Titration of 0.2 M NH4OH (pKb = 4.74) by adding 0.1 M H2SO4(r)Methyl orange (3.1 – 4.4)(d)Titration of 0.3 M Na2CO3 by adding 0.3 M HCl ( & of H2CO3 are 4 × 10–7 & 5.6 × 10–11)(s)Phenolphthalein (8.3 – 10)

The correct answer is A. (A – q); (B – s); (C – p) ; (D – r)

Match the column: Column-IColumn-IITitrations Best Indicato…

Chemistry Ionic Equilibrium General Single Correct MCQ

Published on: August 13, 2026

Match the column:

	Column-I		Column-II
	Titrations		Best Indicator (with its pH range) to detect end point
(a)	Titration of 0.1 M H2SO4 by adding 0.1 M KOH	(p)	Methyl red (4.2 – 6.3)
(b)	Titration of 0.5 M HCOOH (pKa = 3.74) by adding 0.125 M NaOH	(q)	Phenol red (6.8 – 8.2)
(c)	Titration of 0.2 M NH4OH (pKb = 4.74) by adding 0.1 M H2SO4	(r)	Methyl orange (3.1 – 4.4)
(d)	Titration of 0.3 M Na2CO3 by adding 0.3 M HCl ( & of H2CO3 are 4 × 10–7 & 5.6 × 10–11)	(s)	Phenolphthalein (8.3 – 10)

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The correct answer is:

(A – q); (B – s); (C – p) ; (D – r)

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