Question

A. Choose the correct option.

1.Which of the following chemical changes does not happen because of heat?
a. Rotting of apple
b. Burning of paper
c. Cooking vegetables
d. Burning of candle
3. What is the process of water changing into ice called?
a. Boiling
b. Melting
c. Condensation
d. Freezing
4. Which of the following process is shown by iodine and naphthalene?
b. Sublimation
a. Melting
c. Liquefaction
d. Vapourisation
5. What is the boiling point of pure water?
c. 100 °C
b. 50 °C
a. 78 °C
d.0°C​



its physics
chapter- Matter

Answer 1

Answer:

1. a) rotting of apples

3. d) freezing

4. b) sublimation

5. c) 100 °C

If it helps you please mark as brainliest

Answer 2

Correct Answer: B

Solution :

The rubber band can be stretched again by applying force. It is a reversible change

B.) Correct Answer: D

Solution :

In both types of changes (i.e. reversible change and physical change) we can get back the original substance by reversing the conditions.

C.) Correct Answer: D


Correct Answer: D

Solution :

During burning of candle carbon dioxide gas and water vapours are formed therefore it is a chemical change. Also burning of candle result in melting of wax is a physical change.







If
Helpfulmark it as a brainliest