Class 6 Science Chapter 6 MCQ

Class 6 Science Chapter 6 MCQ (Multiple Choice Questions) of Changes Around Us. These MCQs are helpful in the preparation of school tests or online test also. All the questions related to intext as well as exercises are included with answers and explanation here.

Practice here with more than 100 questions related to standard 6 sciences chapter 6. Practicing these questions ensure to get good marks in school assessments.




Class 6 Science Chapter 6 MCQ Online Tests

Class: 6Science
Chapter: 6Changes Around Us
Contents: MCQ Online Tests with answers

Class 6 Science Chapter 6 MCQ Test for 2021-2022

Class 6 Science chapter 6 MCQ Online test is helpful for all the students to clear their doubts and to be confident in NCERT Book for exams. All the questions are taken from NCERT Books for class 6 Science and answers also completely confined to CBSE NCERT Books only.

Q1

Boojho wants to know that which one is irreversible in the following changes:

[A]. Changes of water into water vapour.
[B]. Changes of water vapour into water.
[C]. Changes of ice into water.
[D]. Changes of curd into milk.
Q2

Which of the following changes can be reversed?

[A]. Burning of a candle.
[B]. Making biogas from cow dung.
[C]. Drying of wet cloth.
[D]. Baking cake in an oven.




Q3

Consider the following sentences and choose the reversible changes:

[A]. Changing of bread into toast.
[B]. Chemical change.
[C]. Melting of wax.
[D]. None of the above.
Q4

Paheli is writing some sentences about changes. As “some changes are beneficial to us whereas some are harmful to us”. Consider the sentences and choose the incorrect statement:

[A]. The ripening of fruits is a beneficial change.
[B]. The spoiling of cooked food is a harmful change.
[C]. Heat is the cause of the change of state of ice from solid to liquid.
[D]. Melting of wax is an irreversible change.




Q5

An iron ring is heated. Which of the following statement 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.
Q6

Which of the following will lead to changes which cannot be reversed?

[A]. Addition of water to salt, addition of water to cement.
[B]. Addition of water to cement, addition of water to plaster of Paris.
[C]. Addition of water to plaster of Paris, pouring of water on hot iron rim of a cartwheel.
[D]. Addition of water to salt, pouring of water on hot iron rim of a cartwheel.



Q7

Boojho is writing some sentences as heating create change in different objects. Consider the following sentences which shows reversible changes:

[A]. Expansion of metals on heating is a reversible change.
[B]. Straight wire to coiled wire is a reversible change.
[C]. Melting of coal tar is reversible change.
[D]. All of the above.
Q8

Manish is writing some sentences about changes. Choose the statement where you can say that the statements is or are correct about changes:

[A]. The making of painting on a drawing sheet is an irreversible change.
[B]. The breaking of a toy is a reversible change.
[C]. The age of man is a reversible change.
[D]. The cooking of food is a reversible change.




Q9

There are given some statement about different changes. Choose the statements which are associated with “Irreversible changes”.

[A]. Making painting on a drawing sheet.
[B]. Growth of nails on fingers.
[C]. Burning of wax in the form of candle.
[D]. All the above
Q10

Consider the following sentences which is related to “changes around us” and choose the correct one(s):

[A]. Bursting of balloons is irreversible change.
[B]. Cutting of paper is an irreversible change.
[C]. Sawing (cutting) of a log of wood is an irreversible change.
[D]. All the above.
What are Irreversible changes?

Changes in which the altered forms of substances cannot regain their original forms are called Irreversible changes. These are permanent changes which cannot be reversed even if the cause of the change is removed. In this type of change a new substance is formed because of changes in the molecular arrangements that make up the substance. The internal structure is changed at the molecular level.

What do you know about Reversible Changes?

Changes in which the new object can get back to its original form are called Reversible Changes. These are temporary changes which can be reversed when the cause of the change is removed. In a reversible change, the internal structure of the substance does not usually changes.

What do you understand by Physical change?

Physical change is a temporary change in which no new substance is formed. The change occurs in the
physical form of the substance but not in the chemical form. This is a reversible change.

Describe a chemical change?

Changes in which new substances are formed are know as chemical changes. This is a permanent change in which entirely a new substance is formed with different properties. In most of the cases, it is irreversible.

Difference between Physical

Physical change

1. It is a temporary change. 2. No new substance is formed. 3. It can be reversed. 4. Examples: freezing of water, tearing of paper.

Chemical change

1. It is a permanent change. 2. New substance is formed. 3. It cannot be reversed. 4. Examples:- rusting of iron, cooking of food.