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Class 10 Science Chapter 2: Acids, Bases and Salts Assertion-reason questions with answers

2 assertion-reason questions on Acids, Bases and Salts, each with its answer and the reason, written from the NCERT chapter. Open a question's solution to check your working; then take the free test to find your next chapter. Each question gives an Assertion (A) and a Reason (R); choose how they stand to each other.

Question 1
Assertion (A): Metallic oxides are called basic oxides. Reason (R): Metallic oxides react with acids to give a salt and water.
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Answer: (a) Both A and R are true, and R is the correct explanation of A.

Both are true, and R is the reason: a metal oxide reacts with an acid to give salt and water just as a base does, so it is called a basic oxide.

Question 2
Assertion (A): Baking soda is used as an antacid. Reason (R): Baking soda is produced using sodium chloride as one of its raw materials.
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Answer: (b) Both A and R are true, but R is not the correct explanation of A.

Both are true. Baking soda works as an antacid because it is a mild base that neutralises excess acid; the raw material used to make it does not explain that.

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