Select the correct answer from the list in bracket:
1. The cation discharged at the cathode most readily. [Fe2+, Cu2+, Pb2+, H1+]
2. The anion discharged at the anode with most difficulty. [SO42-, Br1-, NO31-,OH1-]
3. The metallic electrode which does not take part in an electrolytic reaction. [Cu, Ag, Fe, Ni]
4. The ion/s which is/are discharged during electrolysis of aq. CuSO4 using Cu electrode. [Cu2+, SO42-, H1+, OH1-]
5. A covalent compound which in aqueous state conducts electricity. [CCl4, CS2, NH3, C2H4]

Question

Select the correct answer from the list in bracket:
1. The cation discharged at the cathode most readily. [Fe2+, Cu2+, Pb2+, H1+]
2. The anion discharged at the anode with most difficulty. [SO42-, Br1-, NO31-,OH1-]
3. The metallic electrode which does not take part in an electrolytic reaction. [Cu, Ag, Fe, Ni]
4. The ion/s which is/are discharged during electrolysis of aq. CuSO4 using Cu electrode. [Cu2+, SO42-, H1+, OH1-]
5. A covalent compound which in aqueous state conducts electricity. [CCl4, CS2, NH3, C2H4]

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Answer

  1. The cation discharged at the cathode most readily — Cu2+
  2. The anion discharged at the anode with most difficulty — SO42-
  3. The metallic electrode which does not take part in an electrolytic reaction —Fe
  4. The ion which is discharged during electrolysis of aq. CuSO4 using Cu electrode — Cu2+
  5. A covalent compound which in aqueous state conducts electricity — NH3

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Select the correct word from the words in brackets to complete the sentence:
1. The electrode at which anions donate excess electrons and are oxidized to neutral atoms is the …………… [anode/cathode]
2. On electrolysis, Ag1+ and H1+ ions migrate to the …………… [cathode/anode] and …………… [Ag1+/H1+] are discharged.
3. Electrolysis is a / an …………… [oxidation/reduction/redox] reaction in which reduction reaction takes place at the …………… [cathode/anode].
4. According to Arrhenius’s theory the amount of electricity conducted by the electrolyte depends on the …………… [nature/concentration] of the ions in solution.
5. Salts ionize in aq. soln. on passage of electric current to give …………… [negative/positive] ions other than H+ ions.

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Match the statements 1 to 5 with their answers selected from A to J.

A: Cathode, B: Sucrose soln., C: Cl1-, D : Formic acid, E: Electrometallurgy, F: Ammonia, G: Mg2+, H: Electrorefining, I: Sulphur dioxide, J: Anode.

1. A compound containing molecules only.
2. A compound which ionizes in soln. state but not in gaseous state.
3. The ion which accepts electrons from the cathode and gets reduced to neutral atoms.
4. The electrode to which the cyanide ions of aq. Na[Ag(CN)2] migrate during electrolysis.
5. An application of electrolysis in which the anode does not generally diminish in size.

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