Advertisements
Advertisements
प्रश्न
Write the chemical formula of the following compound in a step-by-step manner –
Sodium bromide
Advertisements
उत्तर
Write the formula of
| Sodium bromide | Symbol | Valency |
| Sodium | \[\ce{Na}\] | \[\ce1^+\] |
| Bromide | \[\ce{Br}\] | \[\ce1^-\] |
Step I – Write each symbol with its valency.
\[\ce{Na}^{1+}\] \[\ce{Br}^{1-}\]
Positive ion is written first
Step II – Interchange the valencies and ignore the signs
The Formula is NaBr
APPEARS IN
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 formulae for the following compounds and name the elements present of Sulphuric acid
A solution of a substance ‘X’ is used for white washing.
(a) Name the substance ‘X’ and write its formula.
(b) Write the reaction of the substance ‘X’ named in (a) above with water.
Write the molecular formulae of Sodium hydroxide
Write the molecular formulae of Lead (II) oxide – PbO.
Explain the term ‘variable valency’.
Write the chemical formula of the following compound in a step-by-step manner –
Potassium nitrate
Write the chemical formula of the following compound in a step-by-step manner –
Calcium bicarbonate
Write the chemical formula of the following compound in a step-by-step manner –
Copper [II] oxide
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 |
