Assertion (A) :No new substance is formed when water is heated to get steam. Reason (R) : Conversion of water into steam is a physical change.

Assertion (A) : Burning of a candle is considered a physical as well as chemical change. Reason (R) : Melting of wax is a physical change melted wax turns into vapours and then burns which is a chemical change.

True or False. Steam is formed when heat is released from water.

Say true or false: Steam is formed when heat is released from water.

Assertion: Ozone is unstable. Reason: It is formed by 3 water molecules.

Assertion (A) : It is easier to swim in sea water than in river water. Reason (R): Density of sea water is more than that of river water.

Assertion (A) : the cocoons of silkworms are soaked in hot water. Reason (R ) : The gum that binds the silk threads is softened.

Assertion (A) : Iron ball sinks in water. Reason(R) : Water is denser than iron.