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 2022-2023

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

Class 7 Science Chapter 6 MCQ Tests for 2022-23

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 of the following is a physical change?

[A]. Rusting of iron
[B]. Combustion of magnesium ribbon
[C]. Burning of candle
[D]. Melting of wax
Q2

In which of the following statement are incorrect?

[A]. When a candle burns both physical and chemical change take place
[B]. Anaerobic bacteria digest animal waste and produce biogas
[C]. Ships suffer a lot of damage though they are not painted
[D]. Stretching of rubber band is not a physical change
Q3

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
Q4

Which of the following are true when milk changes into curd?

[A]. Its state is changed from liquid to semi-solid.
[B]. It changes colour and it changes taste.
[C]. Its state is changed from liquid to semi-solid and it changes taste and the change cannot be reversed.
[D]. Its state is changed from liquid to semi-solid and it changes colour and it changes taste and the change cannot be reversed.
Q5

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
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

Galvanization is a process used to prevent rusting of which of the following?

[A]. Iron
[B]. Zinc
[C]. Aluminium
[D]. Copper
Q8

Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystal of sugar got separated. This indicates a:

[A]. Physical change that can be reversed
[B]. Chemical change that can be reversed
[C]. Physical change that cannot be reversed
[D]. Chemical change that cannot be reversed
Q9

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.
Q10

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.
Q11

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.
Q12

Which one is a physical change?

[A]. Melting of ice
[B]. Melting of wax
[C]. Formation of steam from water
[D]. All the above
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

Which one is a chemical change?

[A]. Burning of paper
[B]. Germination of seed
[C]. Formation of coal from wood
[D]. All of these
Q15

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.
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

Paheli is writing some sentences about chemical change. Choose the incorrect statement and help her?

[A]. Rusting and formation fermentation are the example of chemical change.
[B]. In this change in which the composition and chemical properties of the substance get changes.
[C]. This change is permanent and irreversible
[D]. None of the above
Q19

Boojho is writing some sentences about corrosion. Choose the incorrect statements and help him?

[A]. Rusting is a slow oxidation process
[B]. Copper wires lose their shine and acquire green coating.
[C]. Metal surface interacts with oxygen moisture and other gases present in air and slowly get coated with oxide.
[D]. None of 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

In which of the following statement is or are correct?

[A]. Anodizing is the process in which metals like Aluminium, copper etc. are coated electrically to protect them from corrosion.
[B]. Electroplating is the process where metal surface is covered with another metal by using electric current.
[C]. Tinning is a process of giving a coating of molten tin to avoid corrosion.
[D]. All the above
Q24

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.
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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