Topic: Electrochemistry, Test No.: 07, Total MCQs: 10
Congratulations - you have completed Topic: Electrochemistry, Test No.: 07, Total MCQs: 10.
You scored %%SCORE%% out of %%TOTAL%%.
Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1 |
The process
of zinc-plating on iron sheet is known as
galvanization | |
roasting | |
annealing | |
smelting |
Question 2 |
The
logarithm of the equilibrium constant of the cell reaction corresponding to the
cell X(s) | X2+(aq) || Y+(aq)
| Y(s) with standard cell potential, EoCell =
1.2 V is given by
12.5 | |
21.5 | |
40.5 | |
47.5 |
Question 3 |
The oxidation
state of chromium in the final product formed by the reaction between Kl and
acidified potassium dichromate solution is
+6 | |
+4 | |
+3 | |
+2 |
Question 4 |
The pH of
aqueous KCl solution is 7.0. This solution was electrolyzed for a few seconds
using Pt electrodes. Which of the
following is correct?
The pH of solution decreases | |
The pH of solution increases | |
Cl2
is liberated at cathode | |
The pH of solution remains the same |
Question 5 |
The
reduction potential values of X, Y and Z are -3.05 V, -0.44 V and -0.83 V respectively.
Which of the following order is correct with respect to their reducing
property?
X > Y > Z | |
X > Z > Y | |
Y > Z > X | |
Z > Y > X |
Question 6 |
The
specific conductance of 0.1 M NaCl solution is 1.06 ´ 10-2 ohm-1 cm-1. Its molar conductance
in ohm-1 cm2 mol-1 is
1.06 ´ 102 | |
1.06 ´ 103 | |
1.06 ´ 104 | |
53 ´ 102 |
Question 7 |
The
standard EMF of Daniell cell is 1.10 volt. The maximum electrical work obtained
from the Daniell cell is
212.3 kJ | |
175.4 kJ | |
106.15 kJ | |
53.07 kJ |
Question 8 |
The standard potentials at 25°C for the half reactions are given against them below
Zn2+ + 2e− → Zn E° = −0.762V
Mg2+ + 2e− → Mg E° = −2.37V
Zinc duct is added to Mgcl2 solution
Magnesium is precipitated | |
Zinc dissolves in the solution | |
Zinc chloride in formed | |
No reaction takes place |
Question 9 |
The
standard reduction potential for Cu2+/Cu; Zn2+/Zn; Li+/Li;
Ag+/Ag and H+/H2 are 0.34 V, -0.762 V, -3.05 V, + 0.80 V and
0.00 V respectively. Choose the strongest reducing agent among the following.
Zn | |
H2 | |
Ag | |
Li |
Question 10 |
The standard
reduction potentials of Ag, Cu, Co and Zn 0.799, 0.337, –0.277 and –0.762V
respectively. Which of the following cells will have maximum cell e.m.f.?
Zn | Zn+2
(1M) ||Cu2+ (1M) |Cu | |
Zn | Zn2+
(1M) || Ag+ (1M) | Ag | |
Cu | Cu2+
(1M) || Ag+ (1M) | Ag | |
Zn | Zn2+
(1M) || Co2+ (1M) Co |
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 10 questions to complete.