Question

Solve the crossword puzzle with the help of the given clues.

ACROSS
1. Colour of copper sulphate crystals. (4)
2. Chemical reaction that takes place in our body. (9)
3. Iron and copper containers made safe for storing foodstuff. (7)
4. Its presence is required for rusting to take place. (8)
5. Solution left behind after separating the crystals. (12)
DOWN
6. Solids on heating form vapour and the vapour on cooling gives pure solid back. (11)
7. Formation of brown powdery substance on iron surface in the presence of moist air. (7)
8. Metal that protects iron from rusting. (4)
9. A property of the physical change. (10)
10. Metal electroplated on bathroom fittings. (8)
11. A process that produces heat and light. (7)

Accepted Answer

ACROSS
1. Colour of copper sulphate crystals is blue.

2. Chemical reaction that takes place in our body is called digestion.

3. Iron and copper containers made safe for storing foodstuff by the process of tinning.

4. In the presence of moist air rusting take place.

5. Solution left behind after separating the crystals is called mother liquor.

DOWN

6. Solids on heating form vapour and the vapour on cooling gives pure solid back this process is called sublimation.

7. Formation of brown powdery substance on iron surface in the presence of moist air is called rusting.

8. Zinc metal protects iron from rusting.

9. A property of the physical change is reversible.

10. Chromium metal is electroplated on bathroom fittings.

11. A process that produces heat and light is called burning.

Complete crossword:

Important Questions on Physical and Chemical Changes

Learn and Prepare for any exam you want !