Here we are providing Class 7 Science Objective Chapter – 6 Physical and Chemical Changes because its very important for Class 7 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 7 Science Objective Chapter – 6 Physical and Chemical Changes is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 7 Science Objective Chapter –6 Physical and Chemical Changes 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 7 Science Objective Chapter – 6 Physical and Chemical Changes
1.Which of the following statement is incorrect for a chemical reaction?
( A ) Heat may be given out but never absorbed
( B ) Sound may be produced
( C ) A colour change may take place
( D ) A gas may be evolved
Ans – ( A )
2. The process of forming substances in their pure state from their solution is known as:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) all of these
Ans – ( C )
3.Neutralisation is a:
( A ) physical change
( B ) chemical change
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
4.Properties like size, shape, colour, state of a substance are
( A ) chemical properties
( B ) mental properties
( C ) physical properties
( D ) physico-chemical properties
Ans – ( C )
5. Which of the following is an example of physical change?
( A ) A bud turning into a flower
( B ) Rusting of iron
( C ) Boiling of water
( D ) Ripening of a tomato
Ans – ( C )
6.Rusting can be prevented by:
( A ) preventing iron from coming in contact with air and moisture by applying greese or paint
( B ) deposit a layer of a metal like chromium or zinc on iron
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( C )
7.A physical change is generally
( A ) reversible
( B ) irreversible
( C ) considerable
( D ) all of these
Ans – ( A )
8.The process of forming substances in their pure state from their solution is known as:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) all of these
Ans – ( C )
9.During a physical change, a substance undergoes a change in its
( A ) physical properties
( B ) chemical properties
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( A )
10.The process of depositing a layer of zinc on iron is called:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) none of these
Ans – ( A )
11.Rusting of iron is a
( A ) physical change
( B ) chemical change
( C ) both ( A ) and (b)
( D ) all of these
Ans – ( A )
12.Ships suffer a lot of damage from rusting inspite of being painted because:
( A ) sea water contains many salts
( B ) sea water is bitter
( C ) sea water is sour
( D ) sea water is sweet
Ans – ( A )
13.Rusting occurs when iron is exposed to
( A ) oxygen and water
( B ) soil and rain
( C ) breeze and sunlight
( D ) salt water and clouds
Ans – ( A )
14.When carbon dioxide is passed through lime water, the substance formed is
( A ) calcium oxide
( B ) calcium carbonate
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
15.A chemical change is also called a
( A ) chemical reaction
( B ) rusting
( C ) both ( A ) and (b)
( D ) all of these
Ans – ( A )
16.When you leave a piece of iron in the open for some time, it acquires a film of brownish substance. The substance is called:
( A ) acid
( B ) base
( C ) rust
( D ) none of these
Ans – ( C )
17.Burning of any substance is a/an
( A ) physical change
( B ) chemical change
( C ) irreversible change
( D ) both ( B ) and (c)
Ans – ( D )
18.Burning the magnesium ribbon is a:
( A ) physical change
( B ) chemical change
( C ) rusting
( D ) all of these
Ans – ( B )
19.The process of depositing a layer of zinc over iron is known as
( A ) aluminisation
( B ) galvanisation
( C ) fertilisation
( D ) ironing
Ans – ( B )
20.The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change-A) then it burns (Change-B). The following statements pertain to these changes. ChooSe the correct one.
( A ) Process-A is a chemical change
( B ) Process-B is-a chemical change
( C ) Both proceses A and B are chemical changes.
( D ) None of these processes are . chemical changes
Ans – ( B )
21.Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue-coloured crystals 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
Ans – ( C )
22.Which of the following is a reversible change ?
( A ) Rusting
( B ) Chemical
( C ) Physical
( D ) All of these
Ans – ( C )
23.Which among the following is a physical change?
( A ) Burning of wood
( B ) Ripening of fruit
( C ) Cutting a log of wood in small pieces
( D ) Cooking of food
Ans – ( C )
24.Anaerobic bacteria digests animal waste and produces biogas (Change-A). The biogas is then burnt as fuel (Change-B). The following statements pertain to these changes. Choose the correct one.
( A ) Process-A is a chemical change
( B ) Process-B is a chemical change
( C ) Both processes A and B are .chemical changes
( D ) None of these processes are chemical changes
Ans – ( C )
25.Which of the following is a chemical change?
( A ) Germination of seeds
( B ) Cutting a piece of paper
( C ) Bursting of fire crackers
( D ) Both ( A ) and (c)
Ans – ( D )
26.Which of the following is an irreversible change ?
( A ) Physical
( B ) Rusting
( C ) Chemical
( D ) None of these
Ans – ( C )
27.A chemical change may bring
( A ) evolution of gas
( B ) change in colour
( C ) change in taste
( D ) all of these
Ans – ( D )
28.The chemical name of baking soda is:
( A ) hydrogen carbonate
( B ) calcium carbonate
( C ) sodium hydrogen carbonate
( D ) none of these
Ans – ( D )
29.Which is the formula of ozone?
( A ) Fe2O3
( B ) Fe3O2
( C ) O2
( D ) O3
Ans – ( D )
30.Condensation of steam is not a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) both ( A ) and (c)
Ans – ( D )
31.Physical changes are
( A ) reversible
( B ) irreversible
( C ) permanent
( D ) temporary.
Ans – ( A )
32.Beating the alluminium in the boil is a:
( A ) chemical change
( B ) rusting
( C ) physical change
( D ) none of these
Ans – ( C )
33.A change of state from one form to another is a
( A ) physical change
( B ) chemical change
( C ) biological change
( D ) state variation
Ans – ( A )
34.When baking soda is mixed with lemon juice, bubbles are formed with evolution of a gas. A new substance carbon dioxide gas is formed, is a:
( A ) physical change
( B ) crystallisation
( C ) galvanisation
( D ) chemical change
Ans – ( A )
35.Which of the following is an example of a physical change?
( A ) Mixing of baking soda and vinegar together to cause bubbles and foam.
( B ) Falling of a glass cup from the counter and its shattering on the ground.
( C ) Lighting a piece of paper on fire causing it to bum up and leave ashes.
( D ) Baking a birthday cake for your mother.
Ans – ( B )
36.Blooming of flower is a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) galvanisation
Ans – ( A )
37.Which of the following is an
example of a chemical change?
( A ) Filling up a balloon with hot air.
( B ) Taking a glass of water and freezing it by placing it in the freezer.
( C ) A plant collecting sunlight and turning it into food.
( D ) Your dog ripping up your homework.
Ans – ( C )
38.A change that affects iron articles and slowly destroys them is:
( A ) Rusting
( B ) Galvanisation
( C ) Chemical change
( D ) Crystallisation
Ans – ( A )
39.Which of the following changes can easily be reversed?
( A ) Chemical Change
( B ) Physical Change
( C ) Both physical and chemical changes
( D ) Neither physical nor chemical change
Ans – ( B )
40.Photosynthesis is a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) crystallisation
Ans – ( A )
41.When a new substance is formed with different properties than those of the original substance, it is called a
( A ) chemical change
( B ) physical change
( C ) freezing
( D ) boiling
Ans – ( A )
42.Stainless steel, which doesn’t rust, is made by mixing iron with carbon and metals like:
( A ) chromium
( B ) nickel
( C ) manganese
( D ) all of these
Ans – ( D )
43.If the chemical properties of a substance remain unchanged and its appearance or shape changes, it is called a
( A ) chemical change
( B ) physical change
( C ) both physical and chemical changes
( D ) neither physical nor chemical change
Ans – ( B )
44.Rusting of iron objects is faster in:
( A ) deserts
( B ) coastal areas
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
45.Which of the following is an example of a physical change?
( A ) Metal rusting
( B ) Silver tarnishing
( C ) Water boiling
( D ) Paper burning
Ans – ( C )
46.In which type of change a new substance is formed?
( A ) In physical change
( B ) In chemical change
( C ) In both ( A ) and (b)
( D ) In neither of these
Ans – ( B )
47.Which characteristic best describes a physical change?
( A ) Composition changes
( B ) Composition stays the same
( C ) Form stays the same
( D ) Mass is lost
Ans – ( B )
48.Which among the following is a physical change?
( A ) Cutting a log of wood in small pieces
( B ) Burning of wood
( C ) Ripening of fruit
( D ) Cooking of food
Ans – ( A )
49.Which of the following is a chemical change?
( A ) Freezing of water
( B ) Cutting of wood
( C ) Baking of bread
( D ) Bending of wire
Ans – ( C )
50.Which of the following is a chemical change?
( A ) Bursting of a fire cracker
( B ) Germination of seed
( C ) Coal formation from buried trees
( D ) All of these
Ans – ( D )
51.Which of the following is not a clue that could indicate the occurrence of a chemical change?
( A ) Change in colour
( B ) Change in shape
( C ) Change in energy
( D ) Change in odour
Ans – ( B )
52.Which is a method to prevent rust?
( A ) Crystallization
( B ) Sedimentation
( C ) Galvanisation
( D ) None of these
Ans – ( C )
53.Which property stays the same during physical and chemical changes?
( A ) Density
( B ) Shape
( C ) Mass
( D ) Arrangement of particles
Ans – ( C )
54.How crystal of pure substances are obtained?
( A ) By crystallization
( B ) By chromatography
( C ) By peptization
( D ) By all these methods
Ans – ( A )
Class 7 Science Objective Chapter – 6 Physical and Chemical Changes
1.Which of the following statement is incorrect for a chemical reaction?
( A ) Heat may be given out but never absorbed
( B ) Sound may be produced
( C ) A colour change may take place
( D ) A gas may be evolved
Ans – ( A )
2. The process of forming substances in their pure state from their solution is known as:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) all of these
Ans – ( C )
3.Neutralisation is a:
( A ) physical change
( B ) chemical change
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
4.Properties like size, shape, colour, state of a substance are
( A ) chemical properties
( B ) mental properties
( C ) physical properties
( D ) physico-chemical properties
Ans – ( C )
5. Which of the following is an example of physical change?
( A ) A bud turning into a flower
( B ) Rusting of iron
( C ) Boiling of water
( D ) Ripening of a tomato
Ans – ( C )
6.Rusting can be prevented by:
( A ) preventing iron from coming in contact with air and moisture by applying greese or paint
( B ) deposit a layer of a metal like chromium or zinc on iron
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( C )
7.A physical change is generally
( A ) reversible
( B ) irreversible
( C ) considerable
( D ) all of these
Ans – ( A )
8.The process of forming substances in their pure state from their solution is known as:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) all of these
Ans – ( C )
9.During a physical change, a substance undergoes a change in its
( A ) physical properties
( B ) chemical properties
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( A )
10.The process of depositing a layer of zinc on iron is called:
( A ) galvanisation
( B ) neutralisation
( C ) crystallisation
( D ) none of these
Ans – ( A )
11.Rusting of iron is a
( A ) physical change
( B ) chemical change
( C ) both ( A ) and (b)
( D ) all of these
Ans – ( A )
12.Ships suffer a lot of damage from rusting inspite of being painted because:
( A ) sea water contains many salts
( B ) sea water is bitter
( C ) sea water is sour
( D ) sea water is sweet
Ans – ( A )
13.Rusting occurs when iron is exposed to
( A ) oxygen and water
( B ) soil and rain
( C ) breeze and sunlight
( D ) salt water and clouds
Ans – ( A )
14.When carbon dioxide is passed through lime water, the substance formed is
( A ) calcium oxide
( B ) calcium carbonate
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
15.A chemical change is also called a
( A ) chemical reaction
( B ) rusting
( C ) both ( A ) and (b)
( D ) all of these
Ans – ( A )
16.When you leave a piece of iron in the open for some time, it acquires a film of brownish substance. The substance is called:
( A ) acid
( B ) base
( C ) rust
( D ) none of these
Ans – ( C )
17.Burning of any substance is a/an
( A ) physical change
( B ) chemical change
( C ) irreversible change
( D ) both ( B ) and (c)
Ans – ( D )
18.Burning the magnesium ribbon is a:
( A ) physical change
( B ) chemical change
( C ) rusting
( D ) all of these
Ans – ( B )
19.The process of depositing a layer of zinc over iron is known as
( A ) aluminisation
( B ) galvanisation
( C ) fertilisation
( D ) ironing
Ans – ( B )
20.The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change-A) then it burns (Change-B). The following statements pertain to these changes. ChooSe the correct one.
( A ) Process-A is a chemical change
( B ) Process-B is-a chemical change
( C ) Both proceses A and B are chemical changes.
( D ) None of these processes are . chemical changes
Ans – ( B )
21.Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue-coloured crystals 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
Ans – ( C )
22.Which of the following is a reversible change ?
( A ) Rusting
( B ) Chemical
( C ) Physical
( D ) All of these
Ans – ( C )
23.Which among the following is a physical change?
( A ) Burning of wood
( B ) Ripening of fruit
( C ) Cutting a log of wood in small pieces
( D ) Cooking of food
Ans – ( C )
24.Anaerobic bacteria digests animal waste and produces biogas (Change-A). The biogas is then burnt as fuel (Change-B). The following statements pertain to these changes. Choose the correct one.
( A ) Process-A is a chemical change
( B ) Process-B is a chemical change
( C ) Both processes A and B are .chemical changes
( D ) None of these processes are chemical changes
Ans – ( C )
25.Which of the following is a chemical change?
( A ) Germination of seeds
( B ) Cutting a piece of paper
( C ) Bursting of fire crackers
( D ) Both ( A ) and (c)
Ans – ( D )
26.Which of the following is an irreversible change ?
( A ) Physical
( B ) Rusting
( C ) Chemical
( D ) None of these
Ans – ( C )
27.A chemical change may bring
( A ) evolution of gas
( B ) change in colour
( C ) change in taste
( D ) all of these
Ans – ( D )
28.The chemical name of baking soda is:
( A ) hydrogen carbonate
( B ) calcium carbonate
( C ) sodium hydrogen carbonate
( D ) none of these
Ans – ( D )
29.Which is the formula of ozone?
( A ) Fe2O3
( B ) Fe3O2
( C ) O2
( D ) O3
Ans – ( D )
30.Condensation of steam is not a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) both ( A ) and (c)
Ans – ( D )
31.Physical changes are
( A ) reversible
( B ) irreversible
( C ) permanent
( D ) temporary.
Ans – ( A )
32.Beating the alluminium in the boil is a:
( A ) chemical change
( B ) rusting
( C ) physical change
( D ) none of these
Ans – ( C )
33.A change of state from one form to another is a
( A ) physical change
( B ) chemical change
( C ) biological change
( D ) state variation
Ans – ( A )
34.When baking soda is mixed with lemon juice, bubbles are formed with evolution of a gas. A new substance carbon dioxide gas is formed, is a:
( A ) physical change
( B ) crystallisation
( C ) galvanisation
( D ) chemical change
Ans – ( A )
35.Which of the following is an example of a physical change?
( A ) Mixing of baking soda and vinegar together to cause bubbles and foam.
( B ) Falling of a glass cup from the counter and its shattering on the ground.
( C ) Lighting a piece of paper on fire causing it to bum up and leave ashes.
( D ) Baking a birthday cake for your mother.
Ans – ( B )
36.Blooming of flower is a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) galvanisation
Ans – ( A )
37.Which of the following is an
example of a chemical change?
( A ) Filling up a balloon with hot air.
( B ) Taking a glass of water and freezing it by placing it in the freezer.
( C ) A plant collecting sunlight and turning it into food.
( D ) Your dog ripping up your homework.
Ans – ( C )
38.A change that affects iron articles and slowly destroys them is:
( A ) Rusting
( B ) Galvanisation
( C ) Chemical change
( D ) Crystallisation
Ans – ( A )
39.Which of the following changes can easily be reversed?
( A ) Chemical Change
( B ) Physical Change
( C ) Both physical and chemical changes
( D ) Neither physical nor chemical change
Ans – ( B )
40.Photosynthesis is a:
( A ) chemical change
( B ) physical change
( C ) rusting
( D ) crystallisation
Ans – ( A )
41.When a new substance is formed with different properties than those of the original substance, it is called a
( A ) chemical change
( B ) physical change
( C ) freezing
( D ) boiling
Ans – ( A )
42.Stainless steel, which doesn’t rust, is made by mixing iron with carbon and metals like:
( A ) chromium
( B ) nickel
( C ) manganese
( D ) all of these
Ans – ( D )
43.If the chemical properties of a substance remain unchanged and its appearance or shape changes, it is called a
( A ) chemical change
( B ) physical change
( C ) both physical and chemical changes
( D ) neither physical nor chemical change
Ans – ( B )
44.Rusting of iron objects is faster in:
( A ) deserts
( B ) coastal areas
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( B )
45.Which of the following is an example of a physical change?
( A ) Metal rusting
( B ) Silver tarnishing
( C ) Water boiling
( D ) Paper burning
Ans – ( C )
46.In which type of change a new substance is formed?
( A ) In physical change
( B ) In chemical change
( C ) In both ( A ) and (b)
( D ) In neither of these
Ans – ( B )
47.Which characteristic best describes a physical change?
( A ) Composition changes
( B ) Composition stays the same
( C ) Form stays the same
( D ) Mass is lost
Ans – ( B )
48.Which among the following is a physical change?
( A ) Cutting a log of wood in small pieces
( B ) Burning of wood
( C ) Ripening of fruit
( D ) Cooking of food
Ans – ( A )
49.Which of the following is a chemical change?
( A ) Freezing of water
( B ) Cutting of wood
( C ) Baking of bread
( D ) Bending of wire
Ans – ( C )
50.Which of the following is a chemical change?
( A ) Bursting of a fire cracker
( B ) Germination of seed
( C ) Coal formation from buried trees
( D ) All of these
Ans – ( D )
51.Which of the following is not a clue that could indicate the occurrence of a chemical change?
( A ) Change in colour
( B ) Change in shape
( C ) Change in energy
( D ) Change in odour
Ans – ( B )
52.Which is a method to prevent rust?
( A ) Crystallization
( B ) Sedimentation
( C ) Galvanisation
( D ) None of these
Ans – ( C )
53.Which property stays the same during physical and chemical changes?
( A ) Density
( B ) Shape
( C ) Mass
( D ) Arrangement of particles
Ans – ( C )
54.How crystal of pure substances are obtained?
( A ) By crystallization
( B ) By chromatography
( C ) By peptization
( D ) By all these methods
Ans – ( A )
