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प्रश्न
Define of Molecular formula.
उत्तर
Molecular formula: It is a symbolic representation of a molecule. It shows the number of atoms of each element present in it. These atoms combine in whole number to form the molecule.
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संबंधित प्रश्न
Write the molecular formula of the following compounds of Sulphur trioxide.
Find the number and names of elements present in them and calculate their molecular masses.
Write the molecular formulae for the following compounds and name the elements present of Common salt.
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium oxide.
What is variable valency ? Give two examples of elements showing variable valency.
Write the molecular formulae of Iron (II) sulphide.
Write the molecular formulae of Magnesium carbonate.
Explain the term ‘symbol’.
Write the chemical formula of the following compound in a step-by-step manner –
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Write the chemical formula of the following compound in a step-by-step manner –
Copper [II] oxide
Match the statements – 1 to 10 below with their correct answers from – A to J.
| Column I | Column II |
| 1. Elements having valency of two. | A: Br1− |
| 2. An anion | B: Divalent |
| 3. A gaseous non-metal | C: Reactants |
| 4. A cation. | D: Ammonium |
| 5. The term used for the substances which take part in the chemical reaction | E: Nitric oxide |
| 6. The meaning of the symbol ‘Δ’ over the arrow in a chemical equation. | F: Nitrogen |
| 7. The chemical name for nitrogen monoxide. | G: Zero |
| 8. A radical containing nitrogen and hydrogen only | H: Nitrous oxide |
| 9. The chemical name for dinitrogen oxide | I: Heat required |
| 10. The valency of noble gases | J: K1+ |
