Question

If you leave a piece of iron in the open for a few days, it acquires a film of
brownish substance called rust.
(a) Do you think rust is different from iron?
(b) Can you change rust back into iron by some simple method?
(c) Write the cliemical name and formula of rust!
(d) Write the conditions necessary for rust.​

Answer 1

Answer:

a) Yes Rust is different from Iron. Iron is a metal and Rusting is the brown coating of iron oxide developed on the iron surface when it is kept in moisture. Rusting is a chemical which result in slow eating away of Iron.

b) It can't be reversed by any simple method.

c) chemical name is hydrated ferric oxide .

formula Fe2O3•32H2O

d). the presence of air and water vapour in air are two necessary conditions for rusting of iron..

Answer 2

Answer:

(a) Yes, rust is different from iron. Rusting is a special term for corrosion of the metal Iron.

(b) Rust cannot be changed back into iron.

(c) Chemical name of rust is Iron Oxide (Fe2O3).

(d) Air and moisture are necessary for rusting of iron. The presence of acidic gases such as CO2, SO2, SO3 and NO2 in the air increases the rate of rusting

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