For two acids A and B, $p K a_{1} = 1.2, p K a_{2} = 2.8$ respectively in value, then which is true?

A & B both are equally acidic

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A is stronger than B

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B is stronger than A

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None of these

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Solution

The correct option is C A is stronger than B
The value of $p K_{a}$ for strong acid is less.
Hence, A is stronger acid than B.

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