Hint: A buffer solution can be prepared by mixing a weak acid or base with the salt of a strong base or strong acid.
Explanation:
Sodium acetate and acetic acid in water can form buffer solution because sodium acetate is a salt of strong acid \(NaOH\) and weak acid acetic acid.
\(CH _3 COONa + CH _3 COOH\)
Sodium acetate and hydrochloric acid in water cannot form a buffer solution because \(HCl\) is a strong acid.
Ammonia and ammonium chloride in water can from buffer solution because ammonia is a weak base and ammonium chloride is a salt of ammonia and strong acid \(HCl\).
\(NH _4 Cl + NH _3\)
Ammonia and sodium hydroxide in water cannot form buffer solutions because both are bases.
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સૂચિ $I$ (અવક્ષેપિત કરતો પ્રક્રિયક અને પરિસ્થિતિઓ) |
સૂચિ $II$ (ધનાયન (કેટાયન) |
| $A$ $\mathrm{NH}_4 \mathrm{Cl}+\mathrm{NH}_4 \mathrm{OH}$ | $I$ $\mathrm{Mn}^{2+}$ |
| $B$ $\mathrm{NH}_4 \mathrm{OH}+\mathrm{Na}_2 \mathrm{CO}_3$ | $II$ $\mathrm{Pb}^{2+}$ |
| $C$ $\mathrm{NH}_4 \mathrm{OH}+\mathrm{NH}_4 \mathrm{Cl}+\mathrm{H}_2 \mathrm{~S}$ gas | $III$ $\mathrm{Al}^{3+}$ |
| $D$ dilute $\mathrm{HCl}$ | $IV$ $\mathrm{Sr}^{2+}$ |
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