Question

Q.1.
Fill in the blanks by choosing the correct answer from the options given
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

2.condensation

3.air and water

4.beating aluminium to make foil

5.zinc