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प्रश्न
Write the formula of the following compound:
Sodium hydroxide
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उत्तर
Sodium hydroxide - NaOH - `["OH"]^(1-)`
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संबंधित प्रश्न
What is meant by a chemical formula ? Write the formulae of one element and one compound.
Give the formula and valency of:
| Aluminate | ______ | ______ |
Give the empirical formula of : Benzene C6H6
Write the formula of the following compound:
Potassium dichromate
Write the formula of the following compound:
Potassium aluminate
Write the formula of the following compound:
Potassium nitrite
Write the formula of the following compound:
Sodium dichromate
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Calcium chloride
Write the formula of the following compound:
Calcium sulphite
Write the formula of the following compound:
Magnesium oxide
Write the formula of the following compound:
Zinc hydroxide
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Iron [II] chloride
Write the molecular formulae for the following compounds
Iron (III) sulphide
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
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 |
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
