Question

2. Activity-1 Rusting of Iron
1. Material Required: 2 long iron nails, water, plate, box,Greece/oil.
Procedure:
1. Put one iron nail in a plate in open.
2. Put another iron nail also in open butis coated with oil.
3. Now wash both the nails with water. Keep them for 1 week.
4. Record your observation for both the iron nails and identify the
change.​

Answer 1

Explanation:

observations:

the first iron nail that is kept in open will rust early.

and the second one will rust slowly or take more time than the first one.

the change is chemical

Answer 2

Answer:

observation -- The iron nail which was kept in open will rust early because of oxygen and moisture present in air.

The second one will be rusted slowly, though it is kept in open but as it is coated with Greece oil therefore it would be rusted slowly.

This is called rusting. It is a chemical change.

Explanation: