Advertisements
Advertisements
प्रश्न
Write the formula of the following compound:
Calcium sulphate
Advertisements
उत्तर
Calcium sulphate - CaSO4 - `"SO"_4^(2-)`
APPEARS IN
संबंधित प्रश्न
Write the chemical formula of the Magnesium chloride.
What is meant by a chemical formula ? Write the formulae of one element and one compound.
What is the significance of the formula of a substance ?
(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).
Which of the following represents a correct chemical formula ?
Give the empirical formula of : Benzene C6H6
Identify the following substance:
An alkaline gas A which gives dense white fumes with hydrogen chloride.
Name the element in the compound and give the formula of the following compound:
Nitric acid
Write the formula of the following compound:
Potassium hydroxide
Write the formula of the following compound:
Sodium dichromate
Write the formula of the following compound:
Sodium zincate
Write the formula of the following compound:
Magnesium chloride
Write the formula of the following compound:
Magnesium nitrate
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Iron [II] sulphate
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
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
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 |
