Advertisements
Advertisements
प्रश्न
Explain the terms ‘chemical formula’.
Advertisements
उत्तर १
Chemical formula is a representation of a substance either element or compound by means of symbols.
उत्तर २
Chemical Formula: “A molecule of a substance element or compound could be represented by symbols. Representation known as chemical formula i.e. molecular formula of oxygen gas is O2 water H2O, hydrochloric acid HCl etc.
APPEARS IN
संबंधित प्रश्न
What do you understand by :
Noble gases
State whether the following statement is true or false:
The symbol of element cobalt is CO.
The English name of an element is potassium, its Latin name will be :
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
What do the following symbol stand for?
H
In the chemical word equation –
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen.
State the reactants and products of the above reaction. What does the arrow indicate?
Give the symbol of the following element:
Iodine
Give the symbol of the following element:
Radon
State the type of element for the following:
Fluorine
State the type of element for the following:
Chlorine
State what is meant by the term ‘activity series of metals’.
Write the chemical formula of the following:
zinc oxide
Give the formula of the following gas:
Ammonia
State the valency of the following metallic element and write symbol with the valency
Sodium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Silver
write symbol with the variable valency
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bromide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bisulphite
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Phosphate
Write the constituent elements and their symbols for the following compounds.
- Carbon monoxide
- Washing soda
