alleryExcess ammonia dissolves a pale-blue precipitate into a deep-blue solution. Which ion is present?
APb2+
BZn2+
CFe3+
DCu2+
Answer & Solution
Correct answer: D. Cu2+
The deep blue solution contains a copper ammine complex formed when ammonia dissolves copper hydroxide.
Keep practising Analytical Chemistry
Browse all Analytical Chemistry questions for ICSE Class 10, or explore more Chemistry topics.
Related questions
A little NaOH is added to a zinc salt solution. What precipitate forms?More aqueous ammonia is added to a ferric salt's brown precipitate. What occurs?NH4Cl is warmed with NaOH. Which salt remains in solution?A copper(II) sulphate sample is completely anhydrous. What colour is it?Copper(II) sulphate pentahydrate has which appearance?A fresh ferrous sulphate heptahydrate sample appears what colour?What is the usual colour of aqueous iron(III) chloride?Gas from an ammonium salt warmed with NaOH meets moist red litmus. What occurs?