Question

EXERCISE
Physical & Chemical Changes
1. Change is the law of nature and occur in our everyday life, at all times & in all places,
Differentiate between the following changes with a suitable example.
a] Desirable & undesirable change
b] Periodic & non-periodic change
c] Slow & fast change
d] Natural & man-made change
el Reversible & irreversible change​

Answer 1

Answer:

a) desirable change is useful to us.

where as undesirable change is not helpful to us.

b)the change which is repeated after a specific time is called periodic change.

where as a change which does not occur after a specific time is called non periodic change.

c)the change which takes place in a short period of time is called fast change.

where as a change which takes place much time to occur is called slow change.

d) the change which occurs naturally is called natural change.

where as the change which done by man's effort is called man made change.

e) the change which can be reversed is called reversible change.

where as the change which cannot be reversed is called irreversible change.

please follow me on youtube.

my channel name is ----- Sagnik the gamer

Answer 2

Answer:

answer is here..

Desirable change : Desirable change is a change which is useful to us.

Undesirable change : Undesirable changes are those changes which are unuseful to us.

2. Periodic change : periodic changes are those changes which occurs at a particular time or place .

Non periodic. change : Non periodic changes are those changes which does not occurs at a particular time , it can happen at any time.

3. Fast change : the changes which takes place at a short period of time is called fast change.

Slow change : the changes which takes place at the long period of time.

4. Natural change : the changes which occurs naturally are known as natural change.

Man made change : the changes which are caused due to human activities are known as man made changes.

5. Reversible change : the change due to which the substance can be reversed or come back to its original form.

Irreversible change : the changes which cannot be reversed or does not come to its original form.

Explanation:

Thank you...

hope you like the answer..

please mark me as the brainliest answer..

and follow me on brainly..