1. The electrode through which the electron enter the electrolytic solution is

a. anode
b. cathode
c. salt bridge
d. electrolyte

2. Oxidation number of S in Na2S2O3 is

a. +1
b. +2
c. +3
d. +4

3. In the electrolysis of molten ZnCl2 , the cathode reaction is Zn2+ + 2e- ….> Zn , what quantity of electricity is used up for the production of half mole of Zn

a. 2Columbs
b. 1F
c. 2F
d. 2 ampere

4. How many moles of Cr will be produced by 1.5 Faradays of electricity by the following reaction Cr³⁺ + 3es^-1 ……> Cr

a. 0.1
b. 0.2
c. 0.03
d. 1.5

5. E^o_Sn = -0.14V E^o_Pb = -0.13V

a. Sn²⁺ can oxidize Pb
b. Pb²⁺ can oxidize Sn
c. Both can oxidize each other
d. Both can reduce each other

6. A fuel cell operates at …… tempeature

a. low
b. medium
c. high
d. room

7. The oxidation number of Cl in HClO4 is

a. +1
b. -1
c. +5
d. +7

8. In which of following compound oxidation number of N is +5

a. NO2
b. N2O4
c. N2O3
d. N2O5

9. The passage of current through an electrolyte is due to the movement of

a. electrons
b. anions
c. cations
d.ions

10. Oxidation number of an element in free state is

a. positive
b. negative
c. zero
d. cannot be predicted

11. Which of these is not true about electrolyte

a. It can conduct electricity in molten state
b. It can conduct electricity in form of aqueous solution
c. It can conduct electricity in solid form
d. It can be an acid base or salt