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JEE Main levelSingle correct optionDifficulty 2 of 3pb065

When is bubbled continuously through clear lime water, a milky turbidity first appears and then disappears. The species responsible for the clear solution is

  1. A
  2. B
  3. C
  4. D

Answer: B

First gives the turbidity. With excess , , and the soluble hydrogencarbonate makes the solution clear.
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