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
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.
Explain why in the electrolysis of alumina using the Hall Heroult's process the electrolyte is covered with powdered coke.