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Cu^(2+) ions give white precipitate with...

`Cu^(2+)` ions give white precipitate with :

A

potassium iodide solution

B

potassium thiocyanate and saturated solution of `SO_(2)`

C

excess potassium cyanide solution

D

potassium hydroxide solution

Text Solution

Verified by Experts

The correct Answer is:
A, B
(a) `Cu_(2)I_(2)` (White)
(b) `2Cu(SCN)_(2)+SO_(2)+2H_(2)O rarr 2Cu SCN darr +2SCN^(-)+SO_(4)^(2-)+4H^(+)`
(c) `Cu(CN)_(4)^(3-)` is soluble
(d) `Cu(OH)_(2)darr` blue ppt.
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  2. Which of the following solutions give white precipitate with Pb(NO(3))...

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