Updated on June 13, 2023
by Tiwari Academy
by Tiwari Academy
Class 7 Science Chapter 5 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 2024-25
| Class: 7 | Science |
| Chapter: 6 | Physical and Chemical Changes |
| Contents: | Multiple Choice Questions MCQ Tests |
Class 7 Science Chapter 6 MCQ Tests for 2024-25
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
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
Q2
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
Q3
Paheli is writing some sentences, choose the correct sentence and help her:
[A]. Galvanization refers depositing a layer of zinc on iron
[B]. Souring of milk is a chemical change
[C]. Carbon dioxide turns lime water as milky
[D]. All the above
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
Do you know in which of the following sentences is or are incorrect?
[A]. Cutting of a log of wood into pieces is a physical change.
[B]. Limewater turns milky on passing CO2 through it.
[C]. Hydrogen gas are produced when acetic acid is added to a solution of a sodium hydrogen carbonate.
[D]. Explosion of a firework is a chemical change.
Q8
Galvanization is a process used to prevent rusting of which of the following?
[A]. Iron
[B]. Zinc
[C]. Aluminium
[D]. Copper
Q9
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
Q10
Which of the following statements is incorrect for a chemical reaction?
[A]. Heat may be given out by never absorbed
[B]. Sound may be produced
[C]. A colour change may take place
[D]. A gas may be evolved
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
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.
Q17
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
Q18
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
Q19
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
Q20
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.
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
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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Last Edited: June 13, 2023
