Advertisements
Advertisements
प्रश्न
Write the formula of the following compound:
Copper [II] sulphide
Advertisements
उत्तर
Copper [II] sulphide - CuS - `"Cu"^(2+)"S"^(2-)`
APPEARS IN
संबंधित प्रश्न
What is meant by the term chemical formula?
Write the chemical formula of the Magnesium chloride.
What do the following abbreviations stand for ?
- O
- 2O
- O2
- 3O2
If the valency of carbon is 4 and that of sulphur is 2, work out the formula of the compound formed by the combination of carbon with sulphur. What is the name of this compound ?
An element B shows valencies of 4 and 6. Write the formulae of its two oxides.
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
Name the element in the compound and give the formula of the following compound:
Ethane
Name the element in the compound and give the formula of the following compound:
Ethanol
Write the formula of the following compound:
Sodium nitrate
Write the formula of the following compound:
Sodium dichromate
Write the formula of the following compound:
Calcium chloride
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:
Aluminium sulphate
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Lead [II] chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaO
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
BaCl2
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 |

