JEE Previous Year Question
Aqueous solutions of , KOH, COOH and COONa of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is (are)
Topic: JEE PYQ
Answer: C, D. Full step-by-step solution below.
- A and COOH
- BKOH and COONa
- C and COONa
- DCOOH and COONa
Correct answer: C, D
Solution
(c,d)(c) + COONa mixture can act as buffer solution if volume of solution taken is lesser than volume of COONa solution because of following reaction :
COONa + → COOH +
(d) COOH + COONa - mixture will act as buffer.
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