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JEE Advanced levelNumerical answerDifficulty 3 of 3g2154

$p K_{a}$ of benzoic acid is 4.20 and that of 2-nitrobenzoic acid is 2.17. How many times larger is $K_{a}$ of 2-nitrobenzoic acid than $K_{a}$ of benzoic acid? Give the answer to the nearest integer.

Numerical answer type, tolerance 0.5.

Answer: 107

K_{a}

ratio

= 1 0^{4.20 - 2.17} = 1 0^{2.03} = 107.15 \approx 107

.

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