Consider the following experiments and answer the questions at the end of it
(A) When `Fe(CN)_(2)` solution is treated with `KCN` solution species formed no longer gives tests of `Fe^(2+)` and `CN^(Θ)`
(B) When `K_(2)SO_(4)` solution is treated with `A1_(2)(SO_(4))_(3)` solution species formed gives tests of `K^(o+),A1^(3+)` and `SO_(4)^(2-)`
`EAN` of iron formed in `(A)` is .

Options

A. 26
B. 24
C. 36
D. 38

Answer

C

Explanation

`Fe(Z=26),Fe^(+2) =26 - 2=24`
`EAN` of fe in `[Fe(CN)_(6)]^(4-) =26 - 2 + 2 xx 6 = 36` .