This set of Physical Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Inter-Ionic Interactions”.
1. Which one of these acts as an inert electrode?
a) Pt
b) Au
c) Ag
d) Cu
View Answer
Explanation: Inert electrode can be defined as the electrode which is not reactive. It is not a part of redox reactions. Pt or C(gr) can function as an inert electrode.
2. Which of the following changes occur if electricity is passed through the CuSO4 solution by using Pt electrode?
a) Color of the solution becomes fade
b) Color of the solution would not fade
c) H2 is deposited at the cathode
d) Cu is deposited at the cathode
View Answer
Explanation: In the electrolysis of copper sulfate by using inert electrodes(Pt) shows that the blue color starts to fade as copper starts to deposit depleting the concentration of blue copper Cu2+ in the solution.
3. Stronger the oxidizing agent greater is the reduction potential.
a) False
b) True
View Answer
Explanation: Oxidation and reduction are symmetric processes. They always occur together in a reaction. There is always an oxidizing agent and reduction in the reaction. Hence, stronger the oxidizing agent greater is the reduction potential.
4. Which one of the following has maximum oxidation number?
a) Mn
b) Cr
c) S
d) N
View Answer
Explanation: Manganese exhibits states from +2 to +7. Chromium exhibits states +6, +3 and +2. Sulphur oxidation number is +1. Nitrogen exhibits oxidation states from -3 to +5.
5. Which one of the following is not rechargeable?
a) Silver oxide cell
b) Lead storage battery
c) Ni-Cd cell
d) Fuel cell
View Answer
Explanation: Silver oxide cell is a primary cell with a very high energy. It is available in small button cells and large designed cells. It is not rechargeable.
6. In the case of Zn-Cu Cell Zinc acts as an anode and copper as a cathode.
a) True
b) False
View Answer
Explanation: Zn-Cu cell or Daniel cell consists of a cell where Cu and Zn are immersed in the solution. These two cells are connected through the salt bridge where Zn acts as an anode and copper as a cathode.
7. What is a galvanic cell?
a) Electrical energy is converted into heat
b) Electrical energy is converted into chemical energy
c) Chemical energy is converted into heat
d) Chemical energy is converted into electricity
View Answer
Explanation: Galvanic cell is an electrochemical cell. It consists of two metal rods immersed in a solution containing its own ions. It is used to convert chemical energy into electricity.
8. As dilution increases the degree of dissociation of weak electrolyte ___________
a) Increases
b) Decreases
c) Remains constant
d) Zero
View Answer
Explanation: The number of ions furnished by the electrolyte in a solution depends upon the degree of dissociation. As dilution increases, the degree of dissociation of weak electrolyte increases.
9. How does molten NaCl conduct electricity?
a) Free molecules
b) Atoms of Na and Cl
c) Free ions
d) Free Electrons
View Answer
Explanation: A substance must have charged particles to conduct electricity. Therefore, sodium metal conducts electricity through ions which are free to flow.
10. What does electricity carry in an electrolytic solution?
a) Reduction
b) Neutralization
c) Non-spontaneous reaction
d) Spontaneous reaction
View Answer
Explanation: Electrolytic cell is operated through electrolysis which is used to drive an oxidation-reduction reaction which does not occur spontaneously and therefore known as the non-spontaneous reaction.
Sanfoundry Global Education & Learning Series – Physical Chemistry.
To practice all areas of Physical Chemistry, here is complete set of Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
