Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Which of the following solutions have different pH ?
(i) 100 mL of 0.2 M HCl + 100 mL of 0.4 M NH 3
(ii) 50 mL of 0.1 M HCl + 50 mL of 0.2 M NH 3
(iii) 100 mL of 0.3 M HCl + 100 mL of 0.6 M NH 3
Text Solution
Verified by ExpertsThe correct answer is:
D
NH 4 OH + HCI 
NH 4 CI + H 2 O
0.2 M 0.1 0 0
0.1 0 0.1 0.1
pOH = pK b
NH 4 OH + HCI 
NH 4 CI + H 2 O
0.1 0.05 0 0
0.05 0 0.05
pOH = pK b + log 
= pK b
NH 4 OH + HCI 
NH 4 CI + H 2 O
0.3 0.15
0.15 0 0.15
pOH = pK b So all solution have same pH
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