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1
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the correct statement :
A
Iron corrodes in oxygen-free water.
B
Iron corrodes more rapidly in salt water because its electrochemical potential is higher.
C
Corrosion of iron can be minimized by forming a contact with another metal with a higher reduction potential.
D
Corrosion of iron can be minimized by forming an impermeable barrier at its surface.
2
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.
3
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
4
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
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