E. Long Answer Type Questions
1. Describe an activity to show that mixing of vinegar and baking powder is a chemical change.
2. How can you say that burning of a substance is an irreversible change?
3. Encircle the odd one out and give reasons for your choices.
(a) Souring of milk, inflating a balloon, cooking of food, burning of coal
(b) Making of ice cubes, melting of butter, frying of potatoes, heating of water
4. How would you show that chemical changes are irreversible?
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Explanation:
Describe an activity to show that mixing of vinegar and baking powder is a chemical change.
2. How can you say that burning of a substance is an irreversible change?
3. Encircle the odd one out and give reasons for your choices.
(a) Souring of milk, inflating a balloon, cooking of food, burning of coal
(b) Making of ice cubes, melting of butter, frying of potatoes, heating of water
4. How would you show that chemical changes are irreversible