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Chemistry · PYQ NEET UG 2019(1)

हिन्दी

Which will make basic buffer?

  1. A
    \( 100\text{ mL} \) of \( 0.1\text{ M}\text{ CH}_3\text{COOH} + 100\text{ mL} \) of \( 0.1\text{ M}\text{ NaOH} \)
  2. B
    \( 100\text{ mL} \) of \( 0.1\text{ M}\text{ HCl} + 200\text{ mL} \) of \( 0.1\text{ M}\text{ NH}_4\text{OH} \)
  3. C
    \( 100\text{ mL} \) of \( 0.1\text{ M}\text{ HCl} + 100\text{ mL} \) of \( 0.1\text{ M}\text{ NaOH} \)
  4. D
    \( 50\text{ mL} \) of \( 0.1\text{ M}\text{ NaOH} + 25\text{ mL} \) of \( 0.1\text{ M}\text{ CH}_3\text{COOH} \)
View Answer & Solution

Correct answer · Option B

\( 100\text{ mL} \) of \( 0.1\text{ M}\text{ HCl} + 200\text{ mL} \) of \( 0.1\text{ M}\text{ NH}_4\text{OH} \)

Explanation

A basic buffer consists of a weak base and its salt with a strong acid. In option 2, \( 100\text{ mL} \) of \( 0.1\text{ M}\text{ HCl} \) neutralizes \( 100\text{ mL} \) of \( 0.1\text{ M}\text{ NH}_4\text{OH} \), leaving \( 100\text{ mL} \) of unreacted \( 0.1\text{ M}\text{ NH}_4\text{OH} \) and \( 100\text{ mL} \) of \( \text{NH}_4\text{Cl} \), forming a basic buffer.
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