Question

Assertion :Polished iron nails do not rust when kept immersed in a test tube containing boil water covered with a layer of oil. Reason: Rust formation can be controlled with coatings such as paint or varnish that isolate the iron from environment. When only temporary protection is needed for storage or transport a thin layer of oil, grease can be applied to an iron surface.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

Answer: (A)

When polished iron nail kept immersed in a test tube containing boil water with a layer of oil, it get protected by rust.

Rust formation can be controlled with coatings such as paint or varnish that isolate the iron from environment. When only temporary protection is needed for storage or transport a thin layer of oil, grease can be applied to an iron surface.

Hence both assertion and reason are correct and reason is the correct explanation for assertion.