The rusting of iron nail takes place in the presence of
air (oxygen) and water (moisture). It increases the
weight of iron nail due to the formation of rust.
4Fe + $3O_2$ 2+ x$H_2O$ → $2Fe_2O_2$, x$H_2O$
Ram Prasad Bismil was the famous freedom fighter who
was involved in the historic Kakori train robbery. He
was born in 1897 at Shahjahanpur,Uttar Pradesh. On
9th August, 1925, Ram Prasad Bismil along with his
fellow followers looted the money of the British
government from the train while it was passing through
Kakori, Lucknow. Except Chandrashekhar Azad, all
other members of the group were arrested. Ram Prasad
Bismil along with others was given capital punishment.
This great freedom fighter of India was executed on
19th December, 1927.