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प्रश्न
With reference to water and ammonia as compounds respectively, state the valency of oxygen and nitrogen.
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उत्तर
With reference to water (H2O) and ammonia (NH3):
- Valency of oxygen = 2, because it combines with two hydrogen atoms in water.
- Valency of nitrogen = 3, because it combines with three hydrogen atoms in ammonia.
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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 of the following compounds of Ammonia
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 formula for the oxide and sulphide of following elements of Hydrogen
The valency of aluminium is 3. Write the valency of other radicals present in the following compound.
Aluminium chloride
Write the molecular formulae of Ammonium carbonate.
Write the chemical formula of the following compound in a step-by-step manner –
Potassium chloride
Write the chemical formula of the following compound in a step-by-step manner –
Calcium hydroxide
Write the chemical formula of the following compound in a step-by-step manner –
Calcium bicarbonate
Match the statements – 1 to 10 below with their correct answers from – A to J.
| Column I | Column II |
| 1. Elements having valency of two. | A: Br1− |
| 2. An anion | B: Divalent |
| 3. A gaseous non-metal | C: Reactants |
| 4. A cation. | D: Ammonium |
| 5. The term used for the substances which take part in the chemical reaction | E: Nitric oxide |
| 6. The meaning of the symbol ‘Δ’ over the arrow in a chemical equation. | F: Nitrogen |
| 7. The chemical name for nitrogen monoxide. | G: Zero |
| 8. A radical containing nitrogen and hydrogen only | H: Nitrous oxide |
| 9. The chemical name for dinitrogen oxide | I: Heat required |
| 10. The valency of noble gases | J: K1+ |
