Question

V. Fill in the blanks :
(a) On heating, gases
(6) On cooling, solids
(c) The change of a liquid into a solid is called
(d) When some solids are heated, they change directly into vapour. This process is called
change.
(e) Combustion is a/an change
​

Answer 1

Explanation:

a. expand

b. decreases the motion of atoms .and make it light closer.

c.process is called solidification

d.process of sublimation

e. combustion is an exothermic process and its physical state changes not the chemical state.

Answer 2

Explanation:

1. On heating gas converts into vapour

2. solidification forms ice

3. freezing

4. condensation

5. a

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