Question

"A change can be reversed by changing the condition". give an example to support the statement.

Answer 1

Physical Changes: A change that alters some specific physical property of the matter, like its state, texture, magnetic or electrical conditions, or color, without causing any change in the composition of its molecules, is called a physical change.

Physical change is temporary and reversible. It means the change can be reversed by altering the causes which produce the change.

Example: The water formed from melting ice(supply of heat to ice) can be changed back to the ice by placing it in a freezing mixture (a mixture of ice and common salt). this process is freezing(remove of heat from water)