Class 7 Science Chapter 6 MCQ

Class 7 Science Chapter 6 MCQ (Multiple Choice Questions) of Physical and Chemical Changes. It consists of important questions from the entire NCERT Textbook, intext question answers and exercises questions.

All the MCQs are given with complete explanation of answer. Attempt the questions first and then view answers for justification. Practicing with these MCQ online tests ensure you to get good marks in school exams.

Class 7 Science Chapter 6 MCQ for 2021-2022

Class: 7Science
Chapter: 6Physical and Chemical Changes
Contents:Multiple Choice Questions MCQ Tests

Class 7 Science Chapter 6 MCQ Tests for 2021-22

Class 7 Science Chapter 6 MCQ with answers and explanations are given below. All the questions are taken from NCERT Books for Class 7 Science only. There are more than 80 questions in the format of sets of 10 questions at a time. After doing one test, click on Start a New Test for more practice.




Q1

Which one of the following is a chemical change?

[A]. Twinkling of stars
[B]. Cooking of vegetables
[C]. Cutting of roots
[D]. Boiling of water
Q2

In which of the following statements is or are correct?

[A]. Dissolving common salt in water is a physical change
[B]. During rusting iron reacts with moist oxygen to form iron oxide
[C]. Tearing of paper is a physical change it cannot be reversed
[D]. All the above
Q3

Consider the following sentences and choose the correct one:

[A]. Making sugar solution is a physical change
[B]. A physical change is generally reversible
[C]. Grinding of wheat grain changes its size, although it is a physical change
[D]. All the above
Q4

A man painted his main gate made up of iron, to

[A]. Prevent it from rusting
[B]. Protect it from the Sun
[C]. Make it look beautiful
[D]. Make it dust free
Q5

In which of the following sentences is or are correct?

[A]. Rusting is a chemical change because a new substance is formed
[B]. Beating of Aluminium metal to make Aluminium foil, is a physical change
[C]. Digestion of food is a chemical change
[D]. All the above




Q6

Iron Pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its stability?

[A]. It is more than 7 metre height
[B]. It weighs about 6000 kg
[C]. It was built more than 1600 years ago
[D]. It has no rust after such long period
Q7

In which of the following sentences is or are incorrect?

[A]. A change in which only the physical properties of any substances get changed and no new substances is formed.
[B]. A change in which the composition and chemical properties of the substances get changes.
[C]. Microbes produces enzymes which break down complex organic compounds into simpler substance.
[D]. None of the above.
Q8

Consider the following sentences and choose the incorrect one:

[A]. Cooking causes breakdown of complex molecules of carbohydrates, fats and proteins into smaller molecules.
[B]. Rusting is a reddish-brown flaky substance that forms on the surface of any substances.
[C]. Chemical change is permanent and irreversible change.
[D]. Cooking is regarded as a decomposition reaction.
Q9

In which of the following sentences are incorrect?

[A]. Chemical change is also called a chemical reaction.
[B]. In a chemical change it is either evolved or absorbed.
[C]. In a physical change no new substance is formed at all.
[D]. None of the above.
Q10

Two drops of dilute sulphuric acid were added to 1 gram of copper sulphate powder and then small amount of hot water was added to dissolve it (Step-I). On cooling, beautiful blue coloured crystal got separated (Step-II). Step I and Step II are:

[A]. Physical and chemical changes respectively
[B]. Chemical and physical changes respectively
[C]. Both physical change
[D]. Both chemical change



Q11

Which method is used to prevent rusting?

[A]. Galvanization
[B]. Crystallization
[C]. Sedimentation
[D]. None of these
Q12

In which of the following sentences are incorrect?

[A]. Photosynthesis is a chemical change.
[B]. Digestion of food is a chemical change.
[C]. Formation of manure from leaves is a chemical change.
[D]. Iron and rust are the same substances.
Q13

In which of the following sentences is incorrect?

[A]. Cutting of log of wood into pieces is a chemical change.
[B]. Iron pipes coated with zinc do not get rusted easily.
[C]. Condensation of steam is not a chemical change
[D]. The chemical name of baking soda is sodium hydrogen carbonate.
Q14

Mohan is writing some sentences, choose the sentences which is or are incorrect one:

[A]. When carbon dioxide is passed through lime water, it turns milky due to the formation of calcium carbonate.
[B]. The chemical name of baking soda is calcium carbonate.
[C]. Two methods by which rusting of iron can be prevented are painting and galvanization.
[D]. When a candle burns both physical and chemical change take place.
Q15

Crystallization is a process to obtain:

[A]. Pure solids only
[B]. Pure liquid only
[C]. Pure solids and liquids
[D]. Solids or powder



Q16

There are given some statement. In which of the following pair is a chemical change?

[A]. Ice melts on heating, iron rust in moist air.
[B]. Common salt dissolve in water, pulses change on cooking.
[C]. Milk into curd, germination of seeds.
[D]. Ripening of fruits, melting of wax.
Q17

Boojho is writing about physical change. Read the following sentences and choose the incorrect one and help him:

[A]. Evaporation and condensation sublimation are the example of physical change.
[B]. There may be some changes in the physical properties such as state, colours, smell etc.
[C]. The composition of the matter remains on unaltered.
[D]. The physical change is usually permanent.
Q18

Consider the following sentences which is not associated with physical change?

[A]. Melting of wax or butter or ghee
[B]. Glowing of an electric bulb or tube
[C]. Dissolved common salt or sugar in water
[D]. Growing of a seed into a plant
Q19

Consider the following sentences which is not associated with Chemical change?

[A]. Formation of a solution of soluble salt in water
[B]. Changing water into steam by heating
[C]. Ringing of an electric bell
[D]. All the above
Q20

Boojho is writing some sentences. Choose the incorrect one and help him:

[A]. Rusting of iron, photosynthesis and digestion of food are examples of chemical change.
[B]. In order to protect iron from rusting a coating of zinc is deposited on its surface.
[C]. Some substance cannot be obtained in pure state from their solution by crystallization.
[D]. None of the above.




Q21

Consider the following sentences and choose the correct one:

[A]. Making sugar solution is a physical change
[B]. A physical change is generally reversible
[C]. Grinding of wheat grain changes its size, although it is a physical change
[D]. All the above
Q22

Consider the following statements and choose the correct ones:

[A]. Corrosion of metals causes great economic loss.
[B]. Corrosion of metals can be prevented if the contact between metal and air is cutoff.
[C]. A process of giving a thin coating of zinc on Iron sheets to preventing rusting called galvanization.
[D]. All the above
Q23

Paheli is writing some statement which is given by her teacher. Would you help him to choose the correct statements?

[A]. Stainless steel is an alloy of iron which does not rust easily.
[B]. Cooking vessels made of copper and brass are given a coating of tin to avoid corrosion.
[C]. Galvanization process where thin coating of zinc on iron sheets to prevent rusting.
[D]. All the above.
Q24

Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. In a chemical change heat, light or both are generally given out or absorbed.
[B]. Iron utensils when exposed to moist air get gradually coated with reddish brown coating called rust.
[C]. A process of separating a pure substance in the form of crystals from the hot saturated solution by cooling is called crystallization.
[D]. None of the above
Q25

In which of the following statements is or are incorrect?

[A]. Mixing of metals with other metal or nonmetals in molten from is called alloying.
[B]. In an endothermic change heat is absorbed.
[C]. Dissolution of sugar in water is a physical change we get back sugar and water by evaporation.
[D]. Reaction between baking soda and vinegar oxygen is evolved.

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