Assertion: $K_{4} [F e {(C N)}_{6}] \overset{}{\to} F e^{3 +} + C O_{2} + N O_{3}^{-}$ ; equivalent weight of $K_{4} [F e {(C N)}_{6}]$ $= \frac{M}{61}$
(M=molecular weight)
Reason: $K_{4} [F e {(C N)}_{6}] \overset{}{\to} F e^{3 +} + C O_{2} + N O_{3}^{-};$ n-factor for $K_{4} [F e {(C N)}_{6}]$ is 61

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Assertion is false & Reason is true

Assertion is true & Reason is false

Both Assertion & Reason are correct , Reason is not the correct explanation of Assertion

Both Assertion & Reason are correct , Reason is the correct explanation of Assertion

answer is A.

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Detailed Solution

$F e^{+ 2} \overset{}{\to} F e^{+ 3} + e^{-}, n_{f} = 1 6 C N^{-} \overset{}{\to} C O_{2} x - 3 = - 1 x - 4 = 0 n_{f} = 6 \times 2 = 12 x = + 2 x = + 4 \begin{array}{l} 6 (N^{- 3}) \overset{}{\to} N O_{3}^{-} \\ (- 3) (+ 5) n_{f} = 6 \times 8 = 48 \\ ∴ n_{f} = 1 + 12 + 48 = 61 \end{array}$