Advertisements
Advertisements
Question
Write the formula of the following compound:
Iron [III] sulphide
Advertisements
Solution
Iron [III] sulphide - Fe2S3 - `"Fe"^(3+)"S"^(2-)`
APPEARS IN
RELATED QUESTIONS
Write down the formulae for the following compounds :
Calcium oxide
An element X has a valency of 4 whereas another element Y has a valency of 1. What will be the formula of the compound formed between X and Y ?
Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?
What is a chemical formula? What is the significance of a formula?give an example to illustrate?
Name the element in the compound and give the formula of the following compound:
Green vitriol
Write the formula of the following compound:
Sodium carbonate
Write the formula of the following compound:
Sodium plumbite
Write the formula of the following compound:
Sodium bicarbonate
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Magnesium nitrate
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [II] oxide
Write the formula of the following compound:
Copper [II] sulphide
Write the formula of the following compound:
Iron [II] chloride
Write the formula of the following compound:
Lead [II] chloride
Write the formula of the following compound:
Lead [II] sulphate
What do you understand by chemical formula of a compound? What is its significance?
Write the molecular formulae for the following compounds
Mercury (II) chloride
Write the molecular formulae of all the compounds that can be formed by the combination of the following ions
Cu2+, Na+, Fe3+, C1– , `"SO"_4^-2`, `"PO"_4^3-`
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |
