1st Year Chemistry Chapter 10 TestElectrochemistry

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. For the half-reaction if the concentration of , if the concentration of M n + ions is decreased below 1 M at 298 K, how will the actual electrode potential (E) change? 

   1. E will become more positive

   2. E will remain unchanged

   3. E will become less positive (or more negative)

   4. E will always become 0 V

2. 1 Faraday of electricity deposits:

   1. 1 mole of electrons

   2. 6.022 × 10²³ electrons

   3. 1 gram of any metal

   4. Equivalent mass of a substance

3. E^o values help us to determine:

   1. Atomic number

   2. Color of elements

   3. The ease of redox reactions

   4. Boiling points

4. When a non spontaneous redox reaction takes place at the expense of electricity the process is called:

   1. Ionization

   2. Reduction

   3. Oxidation

   4. Electrolysis

5. Voltage of voltaic cell is:

   1. 1.5 volts

   2. 1.1 volts

   3. 1.9 volts

   4. 1.6 volts

6. When fused PbBr₂is electrolyzed:

   1. Lead appears at cathode

   2. Bromine is deposited at the cathode

   3. Lead appears at the anode

   4. None of these happens

7. The activity series of metals arranges metals in order of their:

   1. Atomic mass

   2. Density

   3. Ease of oxidation

   4. Ease of reduction

8. If E deg cell is positive, what does it tell us about the cell reaction?

   1. It is non-spontaneous

   2. It is spontaneous

   3. No reaction occurs

   4. The cell is broken

9. An oxidizing agent is a substance which brings about:

   1. Electron donation

   2. Oxidation

   3. Reduction

   4. Hydrolysis

10. Which of the following is an example of a disproportionation reaction?

    1. 

    2. 

    3. 

    4.