Question

2. Mention one change caused by force/pressure.
1. Name the
changes temperature of a body.
answer.
3. Name one irreversible change.
4. Is dissolution of sugar in water a physical or chemical change ?
5. Is the statement. "all physical changes are reversible” correct ? If so, give an example to support your
SHORT-ANSWER QUESTIONS : Answer in 10-15 words
1. In what ways does a candle change during burning ?
2. How do stirring and heating affect the dissolution of common salt in water?
3. A potter makes clay pots. These pots are dried and then baked. Identify the reversible and irreversible
changes that take place in the process.
4. Why is the ripening of a fruit considered a chemical change ?
5. Mention two characteristics of a chemical change.
LONG ANSWER TYPE QUESTIONS : Answer in 20-25 words
1. Classify the following changes in as many ways as possible :
(a) Growth of a tree (b) Burning of paper (c) Weathering of a rock (d) Making ice-cream from mil
2. State two changes which are reversible.
3. Mention one application of expansion on heating and contraction on cooling.
4. Classify the following into physical and chemical changes.
(a) Melting of wax (b) Burning of agarbatti (c) Tearing of cloth (d) Cooking of food
wann 2 chemical change and a physical change.​

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