Question

Define the following terms.
(a) Reversible change
(b) Chemical change
(c) Physical change​

Answer 1

Answer:

a.Reversible change

change that can be brought to it's normal state

b.Chemical change

change that cannot be reversed

c.Physical change

same as (a)

Answer 2

Answer:

Explanation:

1. Reversible change:- A reversible change is a change that can be reversed or undone. it is a chemical change. when we get back the substance when we started the reaction with,that's a reversible change. example of reversible change are freezing, melting, evaporation.

2. Chemical change:- A chemical change occurs when a new substance is formed through a chemical reaction like when fruits ripens or rots. when something undergoes a "chemical reaction" and a new substance is formed as a result, we call this chemical change. example of chemical change are rusting of iron, burning of wood,paper, etc.

3. Physical change:- A physical change is a change were no new substance are formed. And properties like shape, size, colour and state of a substance are called its physical properties. A change in which a substance undergoes in its physical properties is called a physical change. example of physical changes are crystallisation, cutting, dissolving, etc

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