Question

Iron articles are shiny when new, but get coated with reddish brown powder when left
for sometime. Give reason. What type of chemical reaction is involved in the corrosion
of iron ?
2+2=4​

Answer 1

Answer:

iron particles are shining when new, but get coated with a reddish brown powder when left for sometime in the open as the iron particles are attacked by the atmospheric gases like oxygen and hydrogen

Answer 2

The main reason why the objects made of iron get coated with a reddish-brown powder when left open for some time is due to the attack of atmospheric gases such as hydrogen and oxygen on iron particles. In simple terms, when the iron is left open in the environment it comes in contact with humid air and then it responds with oxygen and forms rust.