The dand fblock elements - Result Question 70
####70. A blue colouration is not obtained when
[1989]
(a) Ammonium hydroxide dissolves in copper sulphate
(b) Copper sulphate solution reacts with $K_4[Fe(CN)_6]$
(c) Ferric chloride reacts with sod. ferrocyanide
(d) Anhydrous $CuSO_4$ is dissolved in water
Topic 3: Lanthanoids and Actinoids
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Solution:
- (b) $2 CuSO_4+K_4[Fe(CN)_6] \longrightarrow$
$Cu_2[Fe(CN)_6]+2 K_2 SO_4$ Chocolate ppt.
