

MCQOPTIONS
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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. | |