Question

IV. State if the following statements are True or False. Correct the false statement.
1. In chemical changes, no new substances are formed.
2. Swinging of the pendulum of a clock is a periodic change.
3. Ripening of fruits is a fast change.
4. Glowing of the filament of a bulb is an example of a physical change.
5. During a physical change, the state and molecular composition changes.
V. Find the odd one out. Give reasons for your answer.
1. Death and decay of plants and animals, burning of paper, high and low tides in sea,
weathering of rocks
2. Rusting of iron, power failure, wear and tear of machines, burning of cooking gas
3. Magnetising a piece of iron, digestion of food, drying of wet clothes, glowing of electric bulb
4. Melting of ice, ageing of living beings, stretching of a rubber band, dissolution of sugar in
water
// C
Understanding Ideas
1. Answer in one word or one sentence:
1. State whether the ironing of clothes is a reversible or an irreversible change.
2. If you put a drop of alcohol on your palm, you feel cool. State whether energy is evolved or
absorbed in this example,
3. Which type of change is seen in the leaves of a Mimosa plant when it is touched?
4. Name the process in which heat is liberated during a change.
5. During a chemical change, energy is either evolved or absorbed. In which form is this energy
seen?​

Answer 1

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Answer 2

Answer:

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Explanation:

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