Question

A) Fill in the blanks

1) Melting of wax is a ----------change

2) If water is sprinkled on anhydrous copper sulphate ,it turns--------- in colour

3) Burning of magnesium is a --------------change

4) The formula of calcium phosphate is --------

5) Symbols for tin ------------

6) ---------------of electrons is known as reduction

7) Respiration in plants is -----------reaction whereas photosynthesis is --------------

reaction

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Answer 1

1. Physical change
2. blue
3. Chemical
4. Ca(PO4)
5. Tin - Sn
6. gain of electrons