1
JEE Main 2016 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ZnSO4?
A
The copper metal will dissolve and zinc metal will be deposited.
B
The copper metal will dissolve with evolution of hydrogen gas.
C
The copper metal will dissolve with evolution of oxygen gas.
D
No reaction will occur.
2
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Galvanization is applying a coating of :
A
Cr
B
Cu
C
Zn
D
Pb
3
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Two Faraday of electricity is passed through a solution of CuSO4. The mass of copper deposited at the cathode is: (at. mass of Cu = 63.5 amu)
A
63.5 g
B
2 g
C
127 g
D
0 g
4
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
Given below are the half-cell reactions:

Mn2+ + 2e- $$\to$$ Mn; Eo = -1.18 V

2(Mn3+ + e- $$\to$$ Mn2+); Eo = +1.51 V

The Eo for 3Mn2+ $$\to$$ Mn + 2Mn3+ will be :
A
– 0.33 V; the reaction will not occur
B
– 0.33 V; the reaction will occur
C
– 2.69 V; the reaction will not occur
D
– 2.69 V; the reaction will occur
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