Question

Study the Venn diagram and identify the points 1, 2 and 3.

Answer 1

$\bullet$ Melting of ice is a reversible physical change.
$\bullet$ Breaking of glass is an irreversible physical change.
$\bullet$ Tearing of paper is an irreversible physical change.
$\bullet$ Evaporation of water is a reversible physical change.
$\bullet$ Making lemonade is a physical change.
$\bullet$ Cutting fruits into small pieces is a physical change.
$\bullet$ During the burning of a candle: melting of wax is a physical change as no new substance is formed.
$\bullet$ Burning of paper is an irreversible chemical change.
$\bullet$ Boiling of rice is an irreversible chemical change.
$\bullet$ Rusting of iron is a chemical change that converts iron metal into a new substance known as rust.
$\bullet$ Baking cake from the batter involves the formation of a new substance. The composition of the batter is different from the composition of the baked cake.
$\bullet$ Burning an LPG stove is an irreversible chemical change.
$\bullet$ Burning of wick and wax nearby involves the formation of new substances such as carbon dioxide gas along with the production of heat and light, thus it is a chemical change.
$\bullet$ ‘1 ' represents the tearing of paper as its an irreversible physical change.
$\bullet$ ‘2’ represents boiling of rice as it is an irreversible chemical change.
$\bullet$ ‘3’ represents the burning of candle as it involves both physical and chemical change.
$\bullet$ Thus, option A is the right answer.