Extra 40 MCQs with answers from the Chapter:6 Changes Around Us for Class 6 CBSE Science:-
Which of the following is a reversible change?
a) Burning of paper
b) Cooking of food
c) Melting of ice
d) Rusting of iron
Ans:
c) Melting of ice
Which type of change is the formation of curd from milk?
a) Reversible change
b) Irreversible change
c) Periodic change
d) Physical change
Ans:
b) Irreversible change
What kind of change is cutting a piece of paper?
a) Physical change
b) Chemical change
c) Irreversible change
d) Both (b) and (c)
Ans:
a) Physical change
Which of the following is an example of a chemical change?
a) Freezing of water
b) Melting of wax
c) Burning of wood
d) Breaking of glass
Ans:
c) Burning of wood
Which of the following changes can be reversed?
a) Cooking of rice
b) Burning of a candle
c) Melting of chocolate
d) Ripening of fruit
Ans:
c) Melting of chocolate
Which process involves expansion?
a) Freezing water
b) Heating a metal rod
c) Breaking a glass
d) Cutting a fruit
Ans:
b) Heating a metal rod
What type of change occurs when water is heated to form steam?
a) Chemical change
b) Irreversible change
c) Reversible change
d) Periodic change
Ans:
c) Reversible change
Which of the following is an irreversible change?
a) Melting of wax
b) Boiling of water
c) Burning of a matchstick
d) Folding a paper
Ans:
c) Burning of a matchstick
Rusting of iron occurs due to the presence of which two elements?
a) Water and oil
b) Water and oxygen
c) Oxygen and nitrogen
d) Iron and salt
Ans:
b) Water and oxygen
Which of these is an example of contraction?
a) Expanding a rubber band
b) Freezing water into ice
c) Heating a metal ring
d) Blowing a balloon
Ans:
b) Freezing water into ice
Burning of wood is an example of:
a) Physical change
b) Reversible change
c) Chemical change
d) Periodic change
Ans:
c) Chemical change
Which of these changes is periodic?
a) Day and night cycle
b) Burning of paper
c) Cooking of food
d) Rusting of iron
Ans:
a) Day and night cycle
Which type of change is the digestion of food?
a) Physical change
b) Reversible change
c) Chemical change
d) No change
Ans:
c) Chemical change
Which of the following does NOT cause a chemical change?
a) Burning of coal
b) Freezing of water
c) Rusting of iron
d) Cooking of food
Ans:
b) Freezing of water
Which of the following is a temporary change?
a) Formation of curd
b) Rusting of iron
c) Stretching a rubber band
d) Burning of paper
Ans:
c) Stretching a rubber band
Which process is used to prevent rusting of iron?
a) Expansion
b) Galvanization
c) Contraction
d) Melting
Ans:
b) Galvanization
Which of these is a slow change?
a) Rusting of iron
b) Bursting of a balloon
c) Burning of paper
d) Cooking of food
Ans:
a) Rusting of iron
Which of the following is a fast change?
a) Growth of a plant
b) Melting of ice
c) Rusting of iron
d) Formation of mountains
Ans:
b) Melting of ice
What happens when you keep an iron nail in water for a long time?
a) It melts
b) It expands
c) It rusts
d) It contracts
Ans:
c) It rusts
Which type of change occurs when a balloon bursts?
a) Physical change
b) Chemical change
c) Irreversible change
d) No change
Ans:
c) Irreversible change
The breaking of a glass tumbler is an example of a:
a) Reversible change
b) Chemical change
c) Physical change
d) Periodic change
Ans:
c) Physical change
What type of change is burning of a candle?
a) Only a physical change
b) Only a chemical change
c) Both physical and chemical changes
d) No change
Ans:
c) Both physical and chemical changes
Which type of change is the melting of ice cream?
a) Irreversible
b) Chemical
c) Reversible
d) Permanent
Ans:
c) Reversible
Which of the following changes shape but not its material?
a) Rusting of iron
b) Cutting a piece of cloth
c) Burning of wood
d) Cooking of food
Ans:
b) Cutting a piece of cloth
Heating causes:
a) Expansion
b) Contraction
c) Rusting
d) None of the above
Ans:
a) Expansion
Cooling causes:
a) Expansion
b) Contraction
c) Boiling
d) No change
Ans:
b) Contraction
What type of change is growing of a tree?
a) Physical change
b) Chemical change
c) No change
d) Reversible change
Ans:
b) Chemical change
The change of water into ice is a:
a) Physical change
b) Chemical change
c) Irreversible change
d) None of the above
Ans:
a) Physical change
Which of the following is NOT an example of expansion?
a) Railway tracks expanding in summer
b) Air inside a balloon heating up
c) Ice melting
d) Metal rods getting longer when heated
Ans:
c) Ice melting
Which type of change is dissolving salt in water?
a) Physical change
b) Chemical change
c) Irreversible change
d) No change
Ans:
a) Physical change
Which of the following is a desirable change?
a) Rusting of iron
b) Spoiling of food
c) Cooking of food
d) Burning of clothes
Ans:
c) Cooking of food
Which of these is a man-made change?
a) Growth of a plant
b) Changing seasons
c) Making a clay pot
d) Earthquake
Ans:
c) Making a clay pot
Which of the following is NOT a natural change?
a) Formation of clouds
b) Tearing of paper
c) Changing seasons
d) Growth of a baby
Ans:
b) Tearing of paper
What happens when a metal plate is heated?
a) It contracts
b) It expands
c) It breaks
d) It disappears
Ans:
b) It expands
Which type of change is fermentation of milk?
a) Physical change
b) Chemical change
c) Reversible change
d) Temporary change
Ans:
b) Chemical change
Which of the following is an example of a slow change?
a) Formation of rust
b) Bursting of crackers
c) Boiling of water
d) Breaking of a glass
Ans:
a) Formation of rust
Which of the following shows both expansion and contraction?
a) A metal ring
b) A rubber band
c) A plastic bottle
d) A wooden block
Ans:
a) A metal ring
When water is cooled, it changes into ice. This process is called:
a) Evaporation
b) Melting
c) Freezing
d) Boiling
Ans:
c) Freezing
What happens when you stretch a rubber band and then release it?
a) It remains stretched
b) It breaks
c) It comes back to its original shape
d) It melts
Ans:
c) It comes back to its original shape
Which of the following statements is TRUE about chemical changes?
a) They are always reversible
b) No new substance is formed
c) They always take place at high temperatures
d) A new substance is formed with different properties
Ans:
d) A new substance is formed with different properties
