cbse 6th Standard Science Changes Around Us Sample Question Papers Study Material - QB365 Set C | QB365

6th Standard CBSE Syllabus & Materials

6th Standard CBSE

CBSE 6th Social Science The Value of Work - New Sample Question Papers Study Material - QB365 Set A

NEW

6th Standard CBSE

CBSE 6th Social Science Family and Community - New Sample Question Papers Study Material - QB365 Set A

NEW

6th Standard CBSE

CBSE 6th Social Science India's Cultural Roots - New Sample Question Papers Study Material - QB365 Set A

NEW

6th Standard CBSE

CBSE 6th Social Science India,That is Bharat - New Sample Question Papers Study Material - QB365 Set A

NEW

6th Standard CBSE

CBSE 6th Social Science Timeline and sources of history - New Sample Question Papers Study Material - QB365 Set A

NEW

6th Standard CBSE

CBSE 6th Social Science Oceans and Continents - New Sample Question Papers Study Material - QB365 Set A

cbse 6th Standard Science Changes Around Us Sample Question Papers Study Material - QB365 Set C

Published on: 24/10/2025

Question Set C

cbse 6th Standard Science Changes Around Us Sample Question Papers Study Material - QB365

Download CBSE Class 6th Standard CBSE Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 6th Standard CBSE Science

Questions + Answers key

Take MCQ Science Test

QB365 Student Learing Managemnet System

Std: 6th Standard CBSE - Science

chapter: Changes Around Us - Sample Question Papers

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Generic 3

2 x 3 = 6

Some bags of cement lying on the floor get wet due to the leakage of tap water in the room. The next day, they are kept in the sunshine. Do you think the changes, that have occurred in the cement could be reversed?

A drawing sheet changes when you draw a picture on it. Can you reverse this change?

Multiple Choice Question

5 x 1 = 5

An iron ring is heated. Which of the following statements about it is incorrect?

(a)

The ring expands

(b)

The ring almost comes to the same size on cooling

(c)

The change in this case is reversed

(d)

The ring changes its shape and the change can not be reversed

Which one of the steps while burning a candle is not reversible?

(a)

Melting of solid wax

(b)

Wax vapour burn into flame

(c)

Liquid wax changes into vapours

(d)

All of the above

Rolling of chapati and baking of chapati are the changes that

(a)

can be reversed

(b)

cannot be reversed

(c)

can be reversed and cannot be reversed respectively

(d)

cannot be reversed and can be reversed respectively

An iron ring is heated. Which of the following statements about it is incorrect?

(a)

The ring expands

(b)

The ring almost comes to the same size on cooling

(c)

The change in this case is reversed

(d)

The ring changes its shape and the change cannot be reversed

Pick the change that can be reversed from the following.

(a)

Cutting of trees

(b)

Melting of ghee

(c)

Burning of candle

(d)

Blooming of flower

True or False

5 x 1 = 5

Physical changes can not be reversed while chemical changes can be reversed

(a)

True

(b)

False

Drying of clothes is a physical and an irreversible change

(a)

True

(b)

False

10.

Paper burning into ash is a irreversible change.

(a)

False

(b)

True

11.

When ice melts to form water, then a change occurs in its state.

(a)

False

(b)

True

12.

Water change in vapour when cooled.

(a)

True

(b)

False

Fill up / 1 Marks

5 x 1 = 5

13.

Burning of candle is ________ process

14.

Liquids _____ on freezing

15.

Burning of paper is a ________change.

16.

Formation of curd from milk is a ________________change.

17.

Formation of rust on iron nail is a____________ change.

Generic 2

5 x 2 = 10

18.

How does a blacksmith change a piece of iron into different tools?

19.

Explosion of a cracker is a chemical change. Explain

20.

Suppose you have dropped your favorite toy and broken it. Can this change be reversed?

21.

An object expands on heating. Write one use of it

22.

A change occurs during the growth of plants. What type of change it is?

Generic 5

2 x 5 = 10

23.

In the given table, check whether the given changes can be reversed or not.

Change	Can be reversed
Raw egg to boiled egg	Yes/No
Batter to Idli
Wet clothes to dry clothes
Woollen yarn to knitted sweater
Grain to its flour
Cold milk to hot milk
Straight string to a coiled string
Bud to flower
Milk to paneer
Cowdung to biogaes
Stretched rubber band to its
normal size
Ice cream to molten ice cream

24.

Give one example in each case.
(a) Change which occurs on heating but can be reversed.
(b) Change which occurs on heating but cannot be reversed.
(c) Change which occurs on cooling but can be reversed.
(d) Change which occurs on mixing two substances but can be reversed.
(e) Change which occurs on mixing two substances but cannot be reversed.

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Generic 3

2 x 3 = 6

Cement bags are converted into a hard mass due to the chemical reaction with water. Anew product is formed, which has entirely different properties. So it being a chemical changes cannot be reversed.

We can reverse this change only if pencil is used for drawing by using eraser. If pen or paint is used for drawing, then we cannot reverse this change.

Multiple Choice Question

5 x 1 = 5

(d)
The ring changes its shape and the change can not be reversed

(b)
Wax vapour burn into flame

(d)
The ring changes its shape and the change cannot be reversed

(b)
Melting of ghee

True or False

5 x 1 = 5

(b)
False

(b)
False

10.

(a)
False

11.

(a)
False

12.

(b)
False

Fill up / 1 Marks

5 x 1 = 5

13.

()
irreversible

14.

()
solidify

15.

()
chemical

16.

()
chemical

17.

()
chemical

Generic 2

5 x 2 = 10

18.

A piece of iron is heated till it becomes red-hot. Then this red-hot iron, which is quite soft, is beaten into desired shapes

19.

When we burn a cracker, it explodes. Heat, light and smoke come out after explosion. Many new products are formed. Hence, it is a chemical change.

20.

No, this change cannot be reversed because the toy cannot be repaired to its previous form

21.

The expansion of an object on heating is used for fixing of iron rim to the wooden wheel of a cart.

22.

It is an irreversible change. A tree cannot be reversed back into a plant or seed. Therefore, growth of a plant is an irreversible change.

Generic 5

2 x 5 = 10

23.

Change	Can be reversed
Raw egg to boiled egg	No
Batter to Idli	No
Wet clothes to dry clothes	Yes
Woollen yarn to knitted sweater	Yes
Grain to its flour	No
Cold milk to hot milk	Yes
Straight string to a coiled string	Yes
Bud to flower	No
Milk to paneer	No
Cowdung to biogas	No
Stretched rubber band to its	Yes
Ice cream to molten ice cream	Yes

24.

The example of each case is as follows:
(a) Heating of an iron rod
(b) Baking of chapati
(c) Formation of ice from water
(d) Formation of salt solution
(e) Mixing of cement and water