CBSE Worksheet for chapter-2 Acid Bases And Salts class 10

Worksheet For class 10

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  • Introduction of acids and bases.
  • Definition of acids and bases by-
  1. Arrhenius
  2. Bronsted and Lowry
  3. Lewis

Classification of acids and bases on the basis of-

  1. Source
  2. Concentration
  3. Strength
  4. Molecular composition
  5. Acidity / Basicity
  • Chemical properties of acids and bases.
  • Indicators.
  • Neutralization and PH.
  • Definition, classification, preparation, properties of salts.
  • Preparation, properties and uses of –
  1. Washing soda
  2. Baking soda
  3. Sodium chloride
  4. Caustic soda
  5. Bleaching powder
  6. Plaster of Paris.

Section - 1

Q1. The gas released when an acid reacts with metal carbonate or bicarbonate is –

  1. H₂
  2. CO₂
  3. O₂
  4. None of these

Q2. The acid present in apples is –

  1. Oxalic acid
  2. Tartaric acid
  3. Malic acid
  4. Formic acid

Q3. The gas produced when a base is heated with an ammonium salt is –

  1. O₂
  2. Ca(OH)₂
  3. Al(OH)₃
  4. None of these

Q4. Bases are –

  1. Usually oxides of metals
  2. Usually hydroxides of metals
  3. Both (A) and (B)
  4. Hydroxides and oxides of non-metals

Q5. The colour of litmus in neutral solution is –

  1. Red
  2. Purple
  3. Blue
  4. Pink

Q6. Vitamin C tablets –

  1. Turns cabbage juice red
  2. Turn turmeric juice deep brown
  3. Both (A) and (B)
  4. Nature cannot be tested

Q7. 'Liming of soil' is done by adding –

  1. CaO
  2. Ca(OH)₂
  3. CaCO₃
  4. All of these

Q8. Bleaching powder sterilizes drinking water by –

  1. Oxidation
  2. Reduction
  3. Both
  4. None of these

Q9. FeSO₄.7H₂O is-

  1. Green vitriol
  2. Oil of vitriol
  3. Blue vitriol
  4. White vitriol

Section - 2

Q10. Give the name and formulae of

  1. Two strong bases
  2. Two weak bases

Q11. Name a gas whose aqueous solution is basic.

Q12. What do you understand by organic acids. Give the name of two organic acids and their sources.

Q13. What will you observe when-

  1. Red litmus paper is introduced into the solution of sodium sulphate ?
  2. Methyl orange is added to dilute hydrochloric acid ?
  3. A drop of phenolphthalein is added to solution of lime water ?
  4. Blue litmus is introduced into a solution of ferric chloride ?

Q14. Name the products formed when sodium hydrogen carbonate is heated.

Write the chemical equation for the reaction involved in the above.

Q15. Explain why –

  1. Common salt becomes sticky during the rainy season ?
  2. Blue vitriol changes to white upon heating ?
  3. Anhydrous calcium chloride is used in dessicators ?
  4. If a bottle full of concentratedSulphuric acid is left openin the atmosphere by accident, the acid starts flowing out of the bottle on its own ?

Q16. Give the chemical names of the following compounds –

  1. Washing soda
  2. Baking soda
  3. Bleaching powder

Q17. How will you prepare the following ? Give chemical reactions also.

  1. Plaster of Paris from Gypsum
  2. Bleaching powder from slaked lime
  3. Baking soda from brine.

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