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

Worksheet For class 10

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Summary

• 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.