Question:
Which of the following salts does not undergo hydrolysis?
Which of the following salts does not undergo hydrolysis?
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Salts of a strong acid with a strong base do not hydrolyse because neither ion reacts with water.
Updated On: Nov 12, 2026
- Ammonium chloride .
- Sodium carbonate .
- Ammonium cyanide .
- Potassium nitrate .
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Hydrolysis happens when an ion of the salt is the conjugate of a weak acid or weak base.
Step 2: Check the Salts
\(\text{NH}_4\text{Cl}\) has the weak base cation \(\text{NH}_4^+\) and hydrolyses. \(\text{Na}_2\text{CO}_3\) has the carbonate ion from a weak acid and hydrolyses. \(\text{NH}_4\text{CN}\) hydrolyses at both ions.
Step 3: Potassium Nitrate
\(\text{KNO}_3\) comes from the strong base KOH and the strong acid \(\text{HNO}_3\), so neither ion reacts with water.
Final Answer:
Potassium nitrate does not undergo hydrolysis. \[ \boxed{\text{(D) }\text{Potassium nitrate}} \]
Hydrolysis happens when an ion of the salt is the conjugate of a weak acid or weak base.
Step 2: Check the Salts
\(\text{NH}_4\text{Cl}\) has the weak base cation \(\text{NH}_4^+\) and hydrolyses. \(\text{Na}_2\text{CO}_3\) has the carbonate ion from a weak acid and hydrolyses. \(\text{NH}_4\text{CN}\) hydrolyses at both ions.
Step 3: Potassium Nitrate
\(\text{KNO}_3\) comes from the strong base KOH and the strong acid \(\text{HNO}_3\), so neither ion reacts with water.
Final Answer:
Potassium nitrate does not undergo hydrolysis. \[ \boxed{\text{(D) }\text{Potassium nitrate}} \]
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