D-And F-Block Elements Ques 206

Question: Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn Blue

[MP PET 2002]

Options:

A) $ KNO_3 $

B) $ AgNO_3 $

C) $ Zn{{(NO_3)}_2} $

D) $ ZnSO_4 $

Show Answer

Answer:

Correct Answer: B

Solution:

When a strip of copper is dipped in the solution of silver nitrate, the solution becomes blue.

$ Cu $ is placed above $ Ag $ in electrochemical series. $ 2AgNO_3+Cu\to Cu{{(NO_3)}_2}+2Ag $



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