Class 10 Science – Practice Question Paper
Chapter: Acids, Bases, and Salts
Time: 1 Hour
Maximum Marks: 40
Time: 1 Hour
Maximum Marks: 40
Section A: (1 Mark Each) – Very Short Answer
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What is the chemical name and formula of baking soda?
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Name a strong acid and a strong base.
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What is the colour of methyl orange in acidic solution?
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Which acid is present in tamarind?
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What is the pH range of basic substances?
Section B: (2 Marks Each) – Short Answer Type I
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Define acids and bases as per the Arrhenius theory.
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What happens when an acid reacts with a metal? Give a balanced chemical equation.
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Why does an aqueous solution of an acid conduct electricity?
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Give one use each of:
a) Plaster of Paris
b) Bleaching powder -
Why is common salt important for our body?
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What is the effect of acids and bases on litmus paper?
Section C: (3 Marks Each) – Short Answer Type II
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Write the chemical equations for the following:
a) Sodium hydroxide reacts with hydrochloric acid
b) Zinc reacts with sulphuric acid
c) Calcium carbonate reacts with hydrochloric acid -
Explain the preparation of washing soda from baking soda.
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What is the neutralization reaction? Give two examples from everyday life.
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Differentiate between strong and weak acids with two examples each.
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Why does acid rain occur? Mention one harmful effect of it.
Section D: (5 Marks Each) – Long Answer
a) Explain the importance of pH in everyday life (at least 3 examples).
b) A sample of rainwater has a pH of 5.6. Is it acidic or basic? Why?
a) Describe a neutralization reaction with a labelled diagram.
b) How is the pH of soil tested, and why is it important in agriculture?
a) What is bleaching powder? How is it prepared?
b) Mention two uses of it.
c) How does it help in water purification?
