Q22 / 90 · JEE Main 2021 (17 Mar Shift 2) · Chemistry

On complete reaction of ${FeCl}_{3}$ with oxalic acid in aqueous solution containing $KOH$ , resulted in the formation of product $A$ . The secondary valency of Fe in the product A is ______ .
(Round off to the Nearest Integer).

Correct answer: 6

Solution

${Fe}^{3 +} + 3 K^{+} + 3 C_{2} O_{4}^{2 -} \to K_{3} \underset{(A)}{[Fe {(C_{2} O_{4})}_{3}]}$

Secondary valency of $Fe$ in 'A' is $6 .$

Hence, the correct answer is 6.

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