Chemistry formula class 10 is an essential topic for students preparing for board exams. It includes important chemical formulas, element names, valency charts, and key reactions. Understanding the chemistry formula class 10 helps in solving numerical problems and mastering concepts like acids, bases, salts, and chemical equations effectively.
Class 10 Chemistry Formula Sheet
Formula Table
| Chemical Formula | Name of Compound | Elements Present | Valency |
|---|---|---|---|
| H₂O | Water | Hydrogen, Oxygen | H = +1, O = -2 |
| CO₂ | Carbon Dioxide | Carbon, Oxygen | C = +4, O = -2 |
| NaCl | Sodium Chloride | Sodium, Chlorine | Na = +1, Cl = -1 |
| CaCO₃ | Calcium Carbonate | Calcium, Carbon, Oxygen | Ca = +2, CO₃ = -2 |
| HCl | Hydrochloric Acid | Hydrogen, Chlorine | H = +1, Cl = -1 |
| NaOH | Sodium Hydroxide | Sodium, Oxygen, Hydrogen | Na = +1, OH = -1 |
| H₂SO₄ | Sulphuric Acid | Hydrogen, Sulphur, Oxygen | H = +1, SO₄ = -2 |
| NH₃ | Ammonia | Nitrogen, Hydrogen | N = -3, H = +1 |
| CH₄ | Methane | Carbon, Hydrogen | C = -4, H = +1 |
| NaHCO₃ | Sodium Bicarbonate | Sodium, Hydrogen, Carbon, Oxygen | Na = +1, HCO₃ = -1 |
Important Reactions
Combustion Reaction:
CH₄ + 2O₂ → CO₂ + 2H₂O + Heat
Neutralization Reaction:
HCl + NaOH → NaCl + H₂O
Decomposition Reaction:
2H₂O₂ → 2H₂O + O₂
Displacement Reaction:
Zn + CuSO₄ → ZnSO₄ + Cu
Double Displacement (Precipitation) Reaction:
BaCl₂ + Na₂SO₄ → BaSO₄↓ + 2NaCl
Thermal Decomposition:
CaCO₃ → CaO + CO₂
Rusting of Iron:
4Fe + 3O₂ + 6H₂O → 4Fe(OH)₃
Chemistry Periodic Table Chart – Elements, Symbols & Atomic Numbers
Class 10 Chemistry Nomenclature Questions with Answers
- Write the IUPAC name of NaCl:
Answer: Sodium Chloride - What is the chemical name of HCl?
Answer: Hydrochloric Acid - Write the IUPAC name of CaCO₃:
Answer: Calcium Carbonate - Give the chemical name of NaOH:
Answer: Sodium Hydroxide - What is the IUPAC name of CH₄?
Answer: Methane - Write the chemical name of H₂O₂:
Answer: Hydrogen Peroxide - Give the IUPAC name of K₂SO₄:
Answer: Potassium Sulphate - What is the name of CO?
Answer: Carbon Monoxide - Write the IUPAC name of Mg(OH)₂:
Answer: Magnesium Hydroxide - What is the chemical name of NH₄Cl?
Answer: Ammonium Chloride