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Class 10 Science Chapter 3: Metals and Non-metals Assertion-reason questions with answers

2 assertion-reason questions on Metals and Non-metals, 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): An iron bucket coated with zinc does not rust even where the coating has been scratched. Reason (R): Zinc is more reactive than iron and corrodes in preference to it.
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Answer: (a) Both A and R are true, and R is the correct explanation of A.

Both are true. A galvanised article stays protected where the zinc coating is broken because zinc, being more reactive, corrodes in preference to iron. R explains A.

Question 2
Assertion (A): Gold is often found in nature in the free state. Reason (R): Gold is the most ductile metal.
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Answer: (b) Both A and R are true, but R is not the correct explanation of A.

Both are true. Gold occurs free because it is at the bottom of the activity series and least reactive; its ductility has nothing to do with that, so R does not explain A.

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