/
-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+
/
Pt
Zn
Mg
Pb
Comprehension
Electrochemical series is series of elements arranged in increasing order of their reduction potential. EH+/H2 = 0. The metals above H2 have –ve reduction potential they are more reactive than hydrogen whereas metals below hydrogen are less reactive than H2. Reduction potential of metal depends upon (i) sublimation energy (ii) ionization energy and hydration energy of ions.
Which of the following is weakest reducing agent among alkali metals?
Na
K
Rb
Cs
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
/