Question

Q.I.
Fill in the blanks by choosing the correct answer from the options given below.
1.
is a chemical compound.
(a) Sea water
(b) Sulphuric acid (c) Oxygen
(d) Petroleum
2.
process is a chemical change.
(a) Evaporation
(b) Condensation (c) Sublimation (d) Precipitation
3.
is necessary for rusting of iron.
(a) Water
(b) Air and water (c) Carbon dioxide (d) Nitrogen
4.
is not a chemical change.
(a) Photosynthesis (b) Digestion of food
(c) Burning of coal (d) Beating aluminium to make foil
5.
metal is used as a protective layer to prevent rusting of iron.
(a) Copper
(b) Zinc
(c) Nickel
(d) Chromium​

Answer 1

Answer:

1) sulphuric acid is a chemical compound.

2)Precipitation process is a chemical change

3) water and oxigen is necessary for rusting of iron.

4)Beating aluminium to make foil is not a chemical change.

5)Zink metal is used as a protective layer to prevent rusting of iron.

Explanation:

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