Question

Q3.Differentiate between physical and chemical changes. [ any two ]​

Answer 1

Answer:

In chemical change one or more new substance are formed

while in physical change no new substance is formed

Answer 2

Explanation:

Physical Change

• When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged.
• Physical change is a temporary change.
• A Physical change affects only physical properties i.e. shape, size, etc.
• Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.

Chemical Change

• When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
• A chemical change is a permanent change.
• Chemical change both physical and chemical properties of the substance including its composition
• A few examples of chemical change are digestion of food, burning of coal, rusting, etc.