Advertisements
Advertisements
Question
Write the formula of the following compound:
Lead [II] oxide
Advertisements
Solution
Lead [II] oxide - PbO - `"O"^(2-)`
APPEARS IN
RELATED QUESTIONS
Write down the formulae of magnesium hydroxide.
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
Give the formula and valency of:
cupric ………………… .
Name the element in the compound and give the formula of the following compound:
Phosphoric acid
Name the element in the compound and give the formula of the following compound:
Acetic acid
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Sodium nitrite
Write the formula of the following compound:
Calcium chloride
Write the formula of the following compound:
Calcium sulphate
Write the formula of the following compound:
Calcium hydroxide
Write the formula of the following compound:
Magnesium bicarbonate
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Zinc nitrate
Write the formula of the following compound:
Copper [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
(NH4)3SO4
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)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 |
Derive the chemical formula for calcium chloride.
