Advertisements
Advertisements
प्रश्न
Write the formula of the following compound:
Sodium carbonate
Advertisements
उत्तर
Sodium carbonate - Na2CO3 - `"Na"^(1+)["CO"_3]^(2-)`
APPEARS IN
संबंधित प्रश्न
What is meant by the term chemical formula?
Explain the difference between 2N and N2.
Write down the formulae for the following compounds :
Calcium oxide
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
An element Y has a valency of 4. Write the formula for its :
- chloride
- oxide
- sulphate
- carbonate
- nitrate
Write chemical formula of the sulphate of Aluminium, Ammonium and Zinc.
Correct the following statement:
Molecular formula of water is H2O2
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Magnesium nitrate
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Copper [II] nitrate
Write the formula of the following compound:
Iron [II] hydroxide
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
What do you understand by chemical formula of a compound? What is its significance?
Which of the following represents a correct chemical formula? Name it.
BiPO4
Write the molecular formulae for the following compounds
Magnesium (II) acetate
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 |

