Question

M is a metal above hydrogen in the activity series and its oxide has the formula M₂O. The oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following:

1. What kind of combination exists between M and O?
2. How many electrons are there in the outermost shell of M?
3. Name the group to which M belongs.
4. State the reaction taking place at the cathode.
5. Name the product at the anode.

Answer 1

1. Electrovalent or ionic compounds
2. One electron is present in the outermost shell of M.
3. Since it has valency 1, M belongs to Group 1.
4. At the cathode: \[\ce{M+ + 1e- -> M}\]
5. At the anode: Oxygen gas