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JEE Main levelSingle correct optionDifficulty 2 of 3ie132

100 mL of a buffer of 0.10 M HA and 0.10 M NaA is diluted to 1.0 L with water. Assuming ideal behaviour, the pH of the diluted solution relative to the original is

  1. Aunchanged
  2. Bhigher by 1
  3. Clower by 1
  4. Dhigher by 0.30

Answer: A

Both components are diluted tenfold, so the ratio salt/acid remains 1 and pH = before and after. Only buffer capacity falls.
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