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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:
- What kind of combination exists between M and O?
- How many electrons are there in the outermost shell of M?
- Name the group to which M belongs.
- State the reaction taking place at the cathode.
- Name the product at the anode.
Solution
- Electrovalent or ionic compounds
- One electron is present in the outermost shell of M.
- Since it has valency 1, M belongs to Group 1.
- At the cathode: \[\ce{M+ + 1e- -> M}\]
- At the anode: Oxygen gas
Notes
Students should refer to the answer according to their questions.
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