Asked by fathima12 | 30th Sep, 2009, 08:11: PM

Expert Answer:

They are physical changes. SInce they do not lead to a chemical reaction with the changes in chemical composition.

Answered by  | 1st Oct, 2009, 09:46: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.