Question

Rust is a hydrated oxide of iron which is

• A. a brown flaky substance
• B. green
• C. white
• D. black

Answer 1

The correct option is A

a brown flaky substance

The explanation for the correct option:

Rusting- It is the process when iron comes in contact with oxygen and moisture present in the air.

• The reddish-brown layer is seen over iron.

(A) a brown flaky substance

• Colour of rust due to formation of the hydrated oxide.

The explanation for the incorrect option:

(B) green, (C) white and (D) black are not the color of oxide over iron due to rusting.

Hence, option (A) i.e, Rust is a hydrated oxide of iron which is a brown flaky substance.