Question

The changing of ice into water is an example of a-

• A. Physical change
• B. Chemical change
• C. Change of state
• D. Both (A) and (C)

Answer 1

The correct option is D

Both (A) and (C)

Explanation for the correct option:

(D) both (A) and (C)

• This includes physical changes which fall under state changes.

Explanation for the incorrect options:

Option (A) Physical change

Here, only the physical properties such as the shape, size, colour, state, or appearance of the substance change.

Some characteristics of a physical change are:

• Its chemical composition remains intact.
• No new substance is formed.
• Most of the physical changes are reversible as we can get the original substance back even after the change.
• Examples- melting of wax, freezing and boiling water, condensation, dissolving sugar in water, etc.

Option(B) Chemical change

Here, the chemical properties of a substance change due to either formation or breaking of chemical bonds at the atomic level.

Some characteristics of a chemical change are:

• Permanent in nature.
• The atomic composition of the substance changes.
• One or more new substances are formed.
• Forms of energy, such as heat, light, or electricity, may be emitted or absorbed.
• It is generally irreversible. At least, it cannot be reversed by simple physical means.
• Examples- burning of fuel, rusting of iron, the souring of milk, growth in a living being, digestion of food, etc.

Option(C) Change of state

• It includes physical changes i.e. inter-conversion of states etc..
• Examples- melting of wax, freezing and boiling water, condensation, dissolving sugar in water, etc

Therefore, option (D) is correct. The changing of ice into water is an example of both (A) and (C).