Question

Reaction of copper and iron with moist air

Answer 1

Answer:

iron when contacted with moist air will make a layer of RUST on it

Answer 2

Reaction of moist air with -

1) Copper

Cu + O₂ → CuO

CuO + H₂O → Cu(OH)₂

Cu(OH)₂ + CO₂ → CuCo₃

CuCo₃ is greenish coating

2) Iron

Fe + H₂O + O₂ → Fe₂O₃. x H₂O

Fe₂O₃. xH₂O is Hydrated Ferric oxide.

This is a reddish brown coating on Iron which is commonly called "Rust"