Question

In a physical change: (a) No new substance is formed (b) The molecules of the substance change (c) Some atoms forming the molecules undergo change (d) All atoms forming the molecules undergo change​

Answer 1

a) No new New Substance formed

Answer 2

In a physical change no new substance is formed (option a).

• A physical change involves the modification of certain physical characteristics of a given substance.
• Physical change does not involve the formation of any new substance because there is no making or breaking of a chemical bond as in a chemical change.
• The atoms in the molecule undergo a physical change of the state but the compound remains the same. Hence option (b), (c) and (d) are incorrect.
• An example of physical change is the boiling of water which involves a physical change of state of water from liquid to vapor.