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प्रश्न
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium sulphate.
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उत्तर
Aluminium sulphate — Al2(SO4)3
Here valency of aluminium is 3
Another radical = Sulphate (SO42-)
Valency of (SO42-) = 2
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संबंधित प्रश्न
Write the molecular formula of the following compounds of Sulphur trioxide.
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 Sodium.
Write the molecular formulae for the following compounds and name the elements present of Nitric acid.
The valency of aluminium is 3. Write the valency of other radicals present in the following compound.
Aluminium chloride
Write the molecular formulae of Iron (III) chloride
Write the chemical formula of the following compound in a step-by-step manner –
Iron [II] hydroxide
Write the chemical formula of the following compound in a step-by-step manner –
Iron [III] sulphur
Write the chemical formula of the following compound in a step-by-step manner –
Iron [III] oxide
Complete the statement given below by filling in the blanks with the correct words.
The valency of iron in FeO is _______ of chlorine [chloride] in CaCl2 is ________ and of dichromate in K2 Cr2 O7 is ________.
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 |
