Question

5. Rahul was a student of Class VII. His father purchased a new bicycle for him on his
birthday. After few months, he found that the cycle chain and even the handle gets
rusted. His father advised him to apply a coating of paint to the cycle and not to keep it
in the open in future.
Now, answer the following questions:
(a) Why his cycle gets rusted?
(b) Is the chemical change or physical change?
(C) Does the rusted cycle will create any problem in moving?

answer this que fast.......​

Answer 1

Answer:

1) As air contains both oxygen and moisture. Thus, in the presence of oxygen and water, his cycle slowly gets rusted. ... This is called rusting of iron.

2) Physical Change Chemical Change

Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

3) Even a novice can do a very decent job of repairing a rusted bicycle, providing that the frame is not structurally compromised. ... Most rust doesnt; need ''repair''. A rusted frame can still be used if you feel like risking it = otherwise replacing the frame is not usually cost effective. Rusty spokes are ok.