Question

1. Historians believe that cotton clothes were first worn in
(a) India
(b) Egypt
(c) China
(d) Europe
2. Which of the following is not a matter?
(a) pain
(b) water
(c) wood
(d) pen
3. Two solids are separated by winnowing depending on the
(a) difference in their colours.
(b) difference in their sizes.
(c) difference in their weights.
(d) ability to get attracted by magnet.
4. A change that takes place on its own
(a) growing of hair
(b) ripening of fruits
(c) falling of leaves
(d) all of these
5. Which of the following changes caused by heat is not reversible?
(a) Change in size and temperature
(b) Change in state
(c) Change in colour
(d) Change in substance
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Answer 1

Answer:

1. Historians believe that cotton clothes were first worn in

b) Egypt

2. Which of the following is not a matter?

(a) pain

3.Two solids are separated by winnowing depending on the

(c) difference in their weights

4.A change that takes place on its own

d) all of these

5.Which of the following changes caused by heat is not reversible?

(d) Change in substance

Explanation:

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Answer 2

Answer:

Question :

1. Historians believe that cotton clothes were first worn in ?

Answer:

Historians believe that cotton clothes were first worn in Egypt.

And therefore, option (b) Egypt is the correct answer.

Question :

2. Which of the following is not a matter?

Answer:

Pain is not a state of matter.

And hence, option (a) pain is the correct answer.

Question :

3. Two solids are separated by winnowing depending on the ?

Answer:

Two solids are separated by winnowing depending on the difference in their weights.

And therefore, option (c) difference in their weights is the correct answer.

Question:

4. A change that takes place on its own in the following ?

Answer:

Growing of hair, ripening of fruits and falling of leaves takes place on its own.

And therefore, option (d) all of these is the correct answer.

Question:

5. Which of the following changes caused by heat is not reversible?

Answer:

Change in substance is caused by heat and is not reversible.

And hence, option (d) Change in substance is the correct answer.