Downs cell is used to prepare_________________?

Related Mcqs:

1. In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?

   A. Hydroxide ions to reach anode
   B. Chlorine gas to mix
   C. Cathode to decay
   D. All of the above

2. In diaphragm cell hydrogen is discharged by the reduction of__________________?

   A. Water
   B. HCI
   C. Na+
   D. NaCl

3. Which is true about Zn-Cu galvanic cell ?

   A. Reduction occurs at anode
   B. K+ ion transfer from salt bridge to left beaker of ZnSO4
   C. Oxidation occurs at cathode
   D. Anode is negatively charged

4. In an electrolytic cell current flows ?

   A. From cathode to anode in outer circuit
   B. From anode to cathode outside the cell
   C. From cathode to anode inside the cell
   D. both B & C

5. In Galvanic cell electrons flow from anode to cathode through__________________?

   A. external electric circuit
   B. salt bridge
   C. movement of ions
   D. all of the above

6. Voltaic cell can be recharged by______________?

   A. by addition of fresh solution
   B. by replacing external circuit with external source of electricity
   C. by removal of solution
   D. by heating it

7. In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________?

   A. greater
   B. lesser
   C. sum of reduction and oxidation potentials
   D. none

8. The element that act as anode always have ______________ position in electrochemical cell?

   A. higher
   B. lower
   C. in middle
   D. no effect of position

9. Which one of the following serve as aquatic solar fuel cell:

   A. Bacteria
   B. Virus
   C. Fungi
   D. Algae

   Submitted by: Said wali shah

10. In Dry cell, cathode is made up of_______?

    A. Zinc
    B. Carbon (Graphite)
    C. ZnCl²
    D. MnO²(Pyrolusite)

    Submitted by: Aamir khan Hullio