ICSE Worksheet for Chapter - 4 Basic Chemistry-Terminology and Reaction Class 8

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Find ICSE Worksheet for chapter-4 Basic Chemistry-Terminology and Reaction class 8

1. CLASS-8
2. BOARD: ICSE
3. Chemistry Worksheet - 4
4. TOPIC: Basic Chemistry-Terminology and Reaction
5. For other ICSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY –

• Symbols: definition, representation by John Dalton and Berzelius.
• Meaning of symbol, radicals, valency, variablevalency.
• Molecular formula, chemical equation and its balancing.
• Main types of chemical equations –

1. Direct combination.
2. Decomposition.
3. Single displacement.
4. Double decomposition.
5. Reversible.
6. Catalytic.
7. Exothermic and endothermic.
8. Oxidation and reduction.

SECTION – 1

1. Write the chemical names of the following compounds :
   1. Ca₃(PO₄)₂
   2. K₂CO₃
   3. KMnO₄
   4. K₂Cr₂O₇
   5. Mg(HCO₃)₂ F) Pb(NO₃)₂
   6. BaSO₄ H) Ag₂O
   7. (CH₃COO)₂Pb J) CaC₂
2. Write the basic and acidic radicals of these compounds and then write the chemical formula.
   1. Barium sulphate
   2. Ammonium nitrate
   3. Calcium bromide
   4. Chromium sulphate
   5. Ferrous sulphide
   6. Calcium phosphate
   7. Potassium iodide
   8. Stannic oxide
   9. Calcium silicate
   10. Sodium zincate
3. Balance the following equation :
   1. Fe + H₂O → Fe₃O₄ + H₂
   2. Ca + N₂ → Ca₃N₂
   3. Zn + KOH → K₂ZnO₂ + H₂
   4. Fe₂O₃ + CO → Fe + CO₂
   5. PbO + NH₃ → Pb + H₂O + N₂
   6. Pb₃O₄ → PbO + O₂
   7. PbS + O₂ → PbO + SO₂
   8. S + H₂SO₄ → SO₂ + H₂O
   9. S + HNO₃ → H₂SO₄ + NO₂ + H₂O
   10. MnO₂ + HCl → MnCl₂ + H₂O + Cl₂
   11. C + H₂SO₄ → CO₂ + H₂O + SO₂
4. Write the balanced chemical equation of the following reactions.
   1. Sodium hydroxide + sulphuric acid → sodium sulphate + water
   2. Potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
   3. Iron + sulphuric acid → ferrous sulphate + hydrogen
   4. Chlorine + sulphur dioxide + water → sulphuric acid + hydrogen chloride
   5. Silver nitrate → silver + nitrogen dioxide + oxygen
   6. Copper + nitric acid → copper nitrate + nitric oxide + water
   7. Ammonia + oxygen → nitric oxide + water
   8. Barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
   9. Zinc sulphide + oxygen → zinc oxide + sulphur dioxide
   10. Aluminium carbide + water → Aluminium hydroxide + methane

SECTION -2

1. What is a symbol ? What information does it convey ?
2. Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate
   1. Write the equation.
   2. Check whether it is balanced, if not balance it.
   3. Find the weights of reactants and products.
   4. What information can be drawn by the above ?
3. 1. What are poly-atomic ions ? Give two examples.
   2. Name the fundamental law which is involved in every equation.
4. Explain the meaning of the term ‘reversible reactions’. Give three different reversible reactions with conditions in which two gases combine to give a gaseous product.
5. The following reaction :<
   Cl₂ +H₂S à2HCl + S Is a redox reaction. Give reason why ?
6. What is a catalyst ? Give two examples of catalytic reactions.