Ag | Ag+ (1 M) || Ag+ (2M) | Ag,0.5 F of electricity in the LHS (anode) and I F electricity in the RHS (cathode) is first passed making independent electrolytic cells at 298 K. EMP of the cell after electrolysis will be:
increased
decreased
Non change
Time is also required
A solution containing one mol per litre each of Cu(NO3)2, AgNO3, Hg2 (NO3)2 and Mg(NO3)2 is being electrolysed by using inert electrodes. The values of the standard oxidation potentials in volts are Ag/Ag+ =-0.8;
Hg/Hg2+ = -0.79; Cu/Cu2+ =-0.34;
Mg/Mg2+ =2.37. The order in which metals will be formed at the cathode will be:
Ag, Cu, Hg, Mg
Ag, Hg, Cu, Mg
Ag, Hg, Cu
Cu, Hg, Ag
/
-0.32 V
+ 0.32 V
+ 1.20 V
– 1.20 V
Normal type of MCQ with one correct option
An ion is reduced to the element when it absorbs
6 × 1020 electrons. The number of equivalents. Of the ion is.
0.01
0.01
0.001
0.0001
Normal type of MCQ with one correct option
Reaction that takes place at graphite anode in dry cell is.
Zn2+ + 2e ( Zn(s)
Zn ( Zn2+ +2e
Mn2+ + 2e ( Mn(s)
Mn(s) ( Mn+ e + 1.5V
Normal type of MCQ with one correct option
In the electrolysis of dilute H2SO4 using platinum electrode
H2 is liberated at cathode
O2 is produced at cathode
Cl2 is obtained at cathode
NH3 is produced at anode
/
A,B
B
C,D
A,C & D
/
Cu2+
Na+
Ag+
Al3+
ASSERTION(REASON
A. The correct order of equivalent conductance at infinite dilution is KCL > NaCl > LiCl
R. KCL is stronger electrolyte then NaCl which is stronger then LiCl.
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not correct explanation of A
A is true, R is false
A is false, R is true
/