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प्रश्न
Write the molecular formula for the oxide and sulphide of following elements of Sodium.
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उत्तर
Sodium oxide Na2O
Sodium sulphide Na2S
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संबंधित प्रश्न
Write the molecular formulae of Copper oxide.
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium sulphate.
Write the molecular formulae of Iron (III) chloride
Write the molecular formulae of Lead (II) oxide – PbO.
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 –
Sodium zincate
Write the chemical formula of the following compound in a step-by-step manner –
Copper [II] oxide
Write the chemical formula of the following compound in a step-by-step manner –
Copper [I] sulphide
Write the chemical formula of the following compound in a step-by-step manner –
Iron [III] sulphur
Match the compounds in List I – 1 to 20 with their correct formulas in List II – A to T.
| List I | List II |
| 1. Copper [I] sulphide | A: KMnO4 |
| 2. Potassium permanganate | B: Mg3N2 |
| 3. Phosphoric acid | C: Mg(NO3)2 |
| 4. Copper [I] oxide | D: Al2(SO4)3 |
| 5. Carbonic acid | E: Na2ZnO2 |
| 6. Aluminium sulphide | F: N2O |
| 7. Iron [II] oxide | G: H2CO3 |
| 8. Iron [III] sulphide | H: Al2S3 |
| 9. Iron [II] sulphate | I: NO |
| 10. Sodium zincate | J: FeS |
| 11. Nitrous oxide | K: Fe2S3 |
| 12. Aluminium sulphate | L: H3PO4 |
| 13. Magnesium nitride | M: Cu2S |
| 14. Iron [III] sulphate | N: CuS |
| 15. Copper [II] oxide | O: Fe2O3 |
| 16. Iron [III] oxide | P: FeO |
| 17. Nitric oxide | Q: FeSO4 |
| 18. Copper [II] sulphide | R: Fe2(SO4)3 |
| 19. Iron [II] sulphide | S: CuO |
| 20. Magnesium nitrate | T: Cu2O |
