Chemistry
Identify the underlined substance: The electrode that increases in mass during the electro-refining of silver.
Related Questions
Differentiate between the following pairs based on the information given in the bracket. Conductor and electrolyte [conducting particles]
Fill in the blanks from the choices give in bracket : An alkali which completely dissociates into ions is …………… [ammonium hydroxide, calcium hydroxide, lithium hydroxide]
An aqueous solution of nickle [II] sulphate was electrolyzed using nickle electrodes. Observe the diagram and answer the questions that follow:
![An aqueous solution of nickle [II] sulphate was electrolyzed using nickle electrodes. What do you observe at the cathode and anode respectively. Name the cation that remains as a spectator ion in the solution. Which equation for the reaction at the anode is correct. Electrolysis, Simplified Chemistry Dalal Solutions ICSE Class 10.](https://cdn1.knowledgeboat.com/img/scd10/nickel-II-sulphate-electrolysed-simplified-chemistry-icse-class-10-1200x609.jpg)
(i) What do you observe at the cathode and anode respectively.
(ii) Name the cation that remains as a spectator ion in the solution.
(iii) Which equation for the reaction at the anode is correct.
- Ni ⟶ Ni2+ + 2e-
- Ni + 2e- ⟶ Ni2+
- Ni2+ ⟶ Ni + 2e-
- Ni2+ + 2e- ⟶ Ni
Choose the correct word which refers to the process of electrolysis from A to E, to match the description (i) to (iv): A: Oxidation, B: Cathode, C: Anode , D: An electrolyte , E : Reduction
(i) Conducts electricity in aq. or in molten state.
(ii) Loss of electrons takes place at anode.
(iii) A reducing electrode
(iv) Electrode connected to the positive end or terminal of the battery.