Question

a) Explain why formation of a cloud is a physical change? b) Explain why the explosion of a cracker is a chemical change?

Answer 1

Answer:

a)

Formation of clouds is a physical change because when water evaporates in the process of evaporation it goes into air and form clouds by the process of condensation . This water goes back to earth by precipitation. This process is repeated again and again.

b)

Explosion of a cracker is a chemical change because the explosive reactants are transformed into gaseous products along with heat, light and sound which cannot be reversed. Hence, it is a chemical change.

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hope it helps....

Answer 2

Explanation:

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@) Formation of clouds is a physical change as it is phase transformation of water from liquid to gas during water cycle and then, gas to liquid. Hence, the physical property of water undergoes change in the formation of clouds.

let's find out why...

it's because Physical change do not change the substance in a material

b) Explosion of a cracker is a chemical change because the explosive reactants are transformed into gaseous products along with heat, light and sound which cannot be reversed. Hence, it is a chemical change.

let's find out why...

it occurs causing the identity of the substance to change.

$additional \: informtion$

what is chemical change?

chemical change is a change that occurs causing the identity of the substance to change...like : burning and digestion

what is physical change?

a change in size shape color or state of matter. Physical change do not change the substance in a material