Question 1MCQ · Analyse · 1 mark
Acids, Bases and Salts · pH in everyday life
Soil extracts P, Q, R and S have pH 4, 6, 7 and 9 respectively. Which is most acidic?
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CBSE Class 10 Science Competency Based Questions
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Question 2MCQ · Analyse · 1 mark
Acids, Bases and Salts · Acid and base properties
Dilute ethanoic acid is added to sodium hydrogen carbonate. Which gas makes limewater milky?
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Question 3MCQ · Analyse · 1 mark
Acids, Bases and Salts · Indicators and ions
Dry hydrogen chloride gas does not change dry blue litmus, but turns moist blue litmus red. Why?
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Question 4MCQ · Analyse · 1 mark
Acids, Bases and Salts · Salts and their uses
A material used for making casts hardens after water is added. Which substance is initially used?
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