Assertion: Pure iron when heated in dry air is covered with a layer of rust. Reason: Rust has the composition Fe3O4.

Question

Assertion: Pure iron when heated in dry air is covered with a layer of rust. Reason: Rust has the composition Fe3O4. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Dry air has no action on pure iron. Rust has the composition Fe2O3.xH2O.

Q. Assertion : Pure iron when heated in dry air is covered with a layer of rust.
Reason : Rust has the composition $F e_{3} O_{4}$ .

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Dry air has no action on pure iron. Rust has the composition Fe₂O₃.xH₂O.

Q. Assertion : Pure iron when heated in dry air is covered with a layer of rust. Reason : Rust has the composition Fe3​O4​.