Identify the correct statements from the following.
(A) Burning of wood is a physical and irreversible change.
(B) Boiling of water is a chemical and reversible change.
(C) Grinding wood into sawdust is a physical and irreversible change.

Correct option is D

The correct answer is (d) :Only C.
(A) Burning of wood is a chemical change because it involves a chemical reaction where the wood undergoes combustion and reacts with oxygen to produce heat, light and new chemical compounds like carbon dioxide and water vapor. It is also an irreversible change because the original wood cannot be recovered.
(B) Boiling of water is a physical change, not a chemical change. It involves the conversion of liquid water vapour due to the input of heat energy. Boiling is a reversible change because when the vapour cools down, it condenses back into liquid water.
(C) Grinding wood into sawdust is a physical change because it only involves a change in the physical state or size of the wood particles. The chemical composition of the wood remains the same. Grinding wood into sawdust is also an irreversible change because the original wood cannot be restored to its original form.