78. Consider the following pairs:
Change Type of Change
1. Melting of ice cube: Physical Change
2. Digesting food: Chemical Change
3. Burning wood: Chemical Change
4. Breaking a glass: Chemical Change
5. Cooking an egg: Physical Change
Which of the pairs given above is/are correctly matched?
78. Consider the following pairs:
Change Type of Change
1. Melting of ice cube: Physical Change
2. Digesting food: Chemical Change
3. Burning wood: Chemical Change
4. Breaking a glass: Chemical Change
5. Cooking an egg: Physical Change
Which of the pairs given above is/are correctly matched?
The correct option is A Only 1, 2 and 3
Physical Change : A physical change is any change in matter that involves the substance going from one physical state to another. The reference to a physical state involves solids, liquids, and gases. When a substance undergoes a physical change it does not lose its original properties when changing from one phase to another. The types of physical changes can vary. A substance can go from a solid to a liquid, a liquid to a gas, a gas to a liquid, a liquid to a solid, a solid to a gas, or a gas to a solid.
Examples of Physical changes:
1. Melting of icecube
2. Breaking a glass
3. Crushing a can
4. Boiling water etc
Chemical Change : Chemical changes involve chemical reactions and the creation of new products. Typically, a chemical change is irreversible. In contrast, physical changes do not form new products and are reversible.
Examples of chemical change
1. burning wood
2. souring milk
3. mixing acid and base
4. digesting food
5. cooking an egg etc
Physical Change : A physical change is any change in matter that involves the substance going from one physical state to another. The reference to a physical state involves solids, liquids, and gases. When a substance undergoes a physical change it does not lose its original properties when changing from one phase to another. The types of physical changes can vary. A substance can go from a solid to a liquid, a liquid to a gas, a gas to a liquid, a liquid to a solid, a solid to a gas, or a gas to a solid.
Examples of Physical changes:
1. Melting of icecube
2. Breaking a glass
3. Crushing a can
4. Boiling water etc
Chemical Change : Chemical changes involve chemical reactions and the creation of new products. Typically, a chemical change is irreversible. In contrast, physical changes do not form new products and are reversible.
Examples of chemical change
1. burning wood
2. souring milk
3. mixing acid and base
4. digesting food
5. cooking an egg etc
