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प्रश्न
What is variable valency ? Give two examples of elements showing variable valency.
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उत्तर
Certain elements exhibit more than one valency, that means they show variable valency.
Ferrous is written as Iron (II) and Ferric is written as Iron (III).
| Metal | Radicals | Valency |
| Iron | Ferrous [Iron (II)] Ferric [Iron (III)] |
2 3 |
| Copper | Cuprous [Copper (I)] Cupric [Copper (II)] |
1 2 |
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संबंधित प्रश्न
Write the molecular formula of the following compounds of Iron (II) sulphide and.
Find the number and names of elements present in them and calculate their molecular masses.
Write the molecular formula for the oxide and sulphide of following elements of Calcium
Write the molecular formulae for the following compounds and name the elements present of Common salt.
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium nitride
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium sulphate.
With reference to water and ammonia as compounds respectively, state the valency of oxygen and nitrogen.
Write the chemical formula of the following compound in a step-by-step manner –
Potassium sulphate
Write the chemical formula of the following compound in a step-by-step manner –
Zinc hydroxide
Write the chemical formula of the following compound in a step-by-step manner –
Potassium permanganate
Write the chemical formula of the following compound in a step-by-step manner –
Potassium dichromate
