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प्रश्न
Write the formula of the following compound:
Zinc oxide
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उत्तर
Zinc oxide - ZnO - `"Zn"^(2+)["O"]^(2-)`
संबंधित प्रश्न
Name the following compounds. Also write the symbols/formulae of the ions present in them :
- CuSO4
- (NH4)2SO4
- Na2O
- Na2CO3
- CaCl2
Which of the following represents a correct chemical formula ?
Give the empirical formula of Acetylene C2H2
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Name the element in the compound and give the formula of the following compound:
Ethanol
Write the formula of the following compound:
Potassium permanganate
Write the formula of the following compound:
Potassium iodide
Write the formula of the following compound:
Potassium bisulphite
Write the formula of the following compound:
Sodium sulphate
Write the formula of the following compound:
Aluminium nitrate
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Tetra amine copper [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
BaCl2
What do you understand by chemical formula of a compound? What is its significance?
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
Which of the following represents a correct chemical formula? Name it.
BiPO4
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
Write the molecular formulae for the following compounds
Iron (III) 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 |
