Question

Which of the following gives blood red colour with KCNS?
A. `Cu^(2+)`
B. `Fe^(3+)` ions
C. `Al^(3+)`
D. `Zn^(2+)`

Answer 1

`Fe^(3+) +3KCNS to underset("Blood red colour")(Fe(CNS)_(3))+3K^(+)`