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प्रश्न
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
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उत्तर
In a chemical reaction, the sum of masses of the reactants and their products remain unchanged. This is called the law of conservation of mass.
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संबंधित प्रश्न
Write down the formula of aluminium chloride.
An element B shows valencies of 4 and 6. Write the formulae of its two oxides.
Complete the following statement by selecting the correct option :
The correct formula of aluminium oxide is
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Copper [II] oxide
Write the formula of the following compound:
Iron [III] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)3
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
Which of the following represents a correct chemical formula? Name it.
BiPO4
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
