Give one example each of chemical change that involves- ( a) Evolution of heat and light b) Production of Sound c) A change in Smell d) A change in colour e) Formation of a gas
Answers
Explanation:
We see ice melting into water, water boiling to vapours and vapours precipitating into the water droplets on cooling. These are some of the examples of Physical Changes since the transition is in the Physical Properties of Water. Substances in Nature undergo various types of changes. The changes that they can undergo are widely classified into two categories viz. Physical and Chemical Changes.
Changes in the Physical Properties of a Substance are known as Physical Changes. Physical Properties of a Substance include colour, size, shape, state, temperature, odour, appearance, texture and many more. In addition, Physical Changes do not lead to the formation of new substances. Physical Changes may or may not be reversible.
Answer:
formation of gas
Explanation: