Changes Can Also Be Classified as Physical or Chemical Changes
Changes Can Also Be Classified as Physical or Chemical Changes: Overview
This topic describes the changes that can be classified as physical and chemical changes. It further elaborates on physical changes like changes in state, mixing of two substances, and some chemical changes like burning, and rusting of iron.
Important Questions on Changes Can Also Be Classified as Physical or Chemical Changes
Justify the statement giving examples — heating brings about chemical changes in some substances whereas physical changes in others.
Addition of water to salt or sand is a physical change whereas to cement is a chemical change. Justify the statement.
Why are burning of wood and ripening of fruits chemical changes?
Why is dissolution of a salt in water a physical change?
Why is melting of wax a physical change?
Dissolution is a
A change in which a new substance is formed is a _____ change.
Is making paneer from milk a physical change?
What kind of change occurs when a pot is made from clay?
What type of change is curdling of milk?
Classify the following changes as physical or chemical with reasons:
Melting of iron, rusting of iron, weathering of rocks, cooking of rice, breaking a rubber band, stretching a rubber band, mixing baking soda with lemon juice, mixing sugar and water, making a dough ball, heating the dough ball, heating water to 100°C, cooling water to 0°C.
