1.

Mark the incorrect statement. 

A.  Melting of wax is a physical change while burning of wax in a candle is a chemical change. 
B.  Metals expand on heating while contract on cooling. Both are physical changes.
C.  The device can be switched off easily if the switch is in the neutral lead.
D.  High and low tides in sea are the examples of non-periodic changes while growth of a tree is a periodic change. 
Answer» E.


Discussion

No Comment Found