Directions for Question: The questions consist of two statements each, printed as assertion and reason. While answering these questions you are required to choose any one of the following four responses:
Assertion: Zinc displaces copper from copper sulphate solution. Reason: The \[{{E}^{o}}_{298}\] of Zn is \[-0.76\]volts and that of Cu is \[+0.34\] volts.A) If both A and R are true, and R is a correct explanation of the A.
B) If both A and R are true, but R is not a correct explanation of the A.
C) If A is true, but R is false.
D) If both A and R are false.
Correct Answer: A
Solution :
\[Zn+C{{u}^{2+}}_{(aq)}\to Z{{n}^{2+}}_{(aq)}+Cu\] \[{{E}^{o}}_{C{{u}^{2+}}/Cu}=0.34v,\] \[{{E}^{o}}_{Z{{n}^{2+}}/Zn}=0.76v,\] The above values show that zinc will release electrons and copper will like to get reduced.
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