Chemistry
A metal 'X' has a valency 2 and a non-metal 'Y' has a valency 3. Write an equation to show how 'Y' forms an ion.
Related Questions
Explain why in the electrolysis of alumina using the Hall Heroult's process the electrolyte is covered with powdered coke.
Describe the role played in the extraction of aluminium by each of the substances listed.
- Cryolite
- Sodium hydroxide
- Graphite
Give scientific reasons for: Zinc oxide can be reduced to zinc by using carbon monoxide, but aluminium oxide cannot be reduced by a reducing agent.
From the oxides — SO2, SiO2, Al2O3, MgO, CO, Na2O — Select
(i) A basic oxide
(ii) An amphoteric oxide.