Question

State True (T) or False (F) against the following sentences :
1. Every change can be classified as either physical or chemical
2. Tearing of paper is irreversible. It is, therefore a chemical change.
3. Some changes can occur even when the interacted substances are not in contact.
4. Metals expand on heating.
5. Burning of candle wax is a reversible change.
6. Cooking is an irreversible change.
7. Solids contract the least while gases contract the most.​

Answer 1

Answer:

1 true

2false

3true

4 false

5 false

6true

7 false

Answer 2

Answer:

1. True

2. False

3. False

4. True

5. True

6. True

7.  True

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