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question_answer1)
What kind of change does a glowing electric bulb undergo?
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Irreversible change done
clear
D)
Undesirable change done
clear
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question_answer2)
Identify the change undergone by burning of wood.
A)
Reversible change done
clear
B)
Physical change done
clear
C)
Chemical change done
clear
D)
All of the above done
clear
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question_answer3)
Which of the following is NOT a chemical change?
A)
Digestion of food done
clear
B)
Precipitation of rain and snow done
clear
C)
Rusting of iron done
clear
D)
Burning of paper done
clear
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question_answer4)
Why is the rusting of iron grouped under a chemical change?
A)
It changes its colour. done
clear
B)
It becomes powdery. done
clear
C)
A new substance is formed. done
clear
D)
It changes its shape. done
clear
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question_answer5)
Study the reaction given below.
Copper sulphate (soln.) + Iron \[\to \] Iron sulphate (soln.) + Copper |
What kind of a change takes place in the given reaction?
A)
Chemical change done
clear
B)
Physical change done
clear
C)
Biochemical done
clear
D)
Both (A) and (B) done
clear
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question_answer6)
What kind of change is undergone when wheat flour is made into a chapati?
A)
Physical change. done
clear
B)
Reversible, chemical change. done
clear
C)
Irreversible, chemical change. done
clear
D)
Change of state. done
clear
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question_answer7)
Which of the following is a chemical change?
A)
Food gives out a foul smell done
clear
B)
Pollution of air caused due to explosion of fireworks done
clear
C)
Change of colour in a cut apple, if left outside done
clear
D)
All of the above done
clear
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question_answer8)
Some pieces of chalk are mixed with water. In this change, how many new substances is/are formed?
A)
1 done
clear
B)
2 done
clear
C)
3 done
clear
D)
No new substance is formed. done
clear
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question_answer9)
Pooja took a candle in a vessel and heated the vessel. Even though the candle did not burn, it changed its shape and state. What kind of change is this?
A)
Neutralization done
clear
B)
Physical change done
clear
C)
Chemical change done
clear
D)
Irreversible change done
clear
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question_answer10)
What kind of change does sodium chloride undergo when it is added to water?
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Chemical reaction done
clear
D)
Temporary change done
clear
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question_answer11)
Match the entries in Column-l with those in Column-ll.
| Column I | | Column II |
(a) | Burning of wood | 1 | Physical change |
(b) | Formation of day and night | 2 | Slow change |
(c) | Curdling of milk | 3 | Periodic change |
(d) | Melting of ice | 4 | Chemical change |
A)
a-2, b-3, c-4, d-1 done
clear
B)
a-4, b-3, c-2, d-1 done
clear
C)
a-4, b-3, c-1, d-2 done
clear
D)
a-3, b-4, c-2, d-1 done
clear
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question_answer12)
Which of the following is a physical change?
A)
Grinding of wheat done
clear
B)
Photosynthesis done
clear
C)
Curdling of milk done
clear
D)
Burning of coal done
clear
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question_answer13)
Which of the following properties of iron is NOT a physical property?
A)
Electrical conductivity done
clear
B)
Magnetic property done
clear
C)
Good conductor of heat done
clear
D)
Reaction with moisture to get rusted done
clear
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question_answer14)
Which of the following is NOT a property of physical change?
A)
Change in state and colour done
clear
B)
Change in composition done
clear
C)
Temporary change done
clear
D)
Reversible change done
clear
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question_answer15)
What kind of change is undergone by the expansion of railway tracks during summer?
A)
Irreversible, physical change done
clear
B)
Reversible, physical change done
clear
C)
Irreversible, chemical change done
clear
D)
Reversible, chemical change done
clear
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question_answer16)
Which of the following is NOT a physical change?
A)
Tearing a paper done
clear
B)
Heating an iron rod to bend it done
clear
C)
Freezing water into ice done
clear
D)
Growth of a sapling into a tree done
clear
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question_answer17)
What kind of change is neutralization?
A)
A physical change done
clear
B)
A chemical change done
clear
C)
Sometimes a physical and some- times a chemical change done
clear
D)
Neither a physical nor a chemical change done
clear
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question_answer18)
Identify the correct characteristic of a physical change.
A)
Permanent change done
clear
B)
Irreversible done
clear
C)
Change in composition done
clear
D)
Change in colour done
clear
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question_answer19)
Which of the following changes does sugar undergo when it is dissolved in water to form sugar solution?
A)
Chemical change done
clear
B)
Physical change done
clear
C)
Neutralization reaction done
clear
D)
Irreversible change done
clear
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question_answer20)
Which of the following is a chemical change?
A)
Cooking of food done
clear
B)
Evaporation of water done
clear
C)
Mowing of grass done
clear
D)
Melting of wax done
clear
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question_answer21)
Which of the following is NOT a chemical change?
A)
Respiration done
clear
B)
Crystallization done
clear
C)
Combustion done
clear
D)
Oxidation done
clear
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question_answer22)
Which of the following is NOT correctly paired?
A)
Sublimation - Physical change done
clear
B)
Precipitation - Physical change done
clear
C)
Decomposition - Chemical change done
clear
D)
Decantation - Chemical change done
clear
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question_answer23)
What kind of change is undergone by the burning of wax?
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Reversible change done
clear
D)
Periodic change done
clear
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question_answer24)
Which of the following is an irreversible change?
A)
Change of water into steam done
clear
B)
Melting of wax done
clear
C)
Transpiration done
clear
D)
Corrosion done
clear
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question_answer25)
When a substance undergoes a physical change, what change is seen in its mass?
A)
It increases. done
clear
B)
It decreases. done
clear
C)
It remains the same. done
clear
D)
It either increases or decreases. 4 done
clear
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question_answer26)
Which of the following is a chemical change?
A)
Explosion of crackers done
clear
B)
Magnetization of iron done
clear
C)
Charging of a battery done
clear
D)
Both (B) and (C) done
clear
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question_answer27)
When an iron bar of length 12 cm is magnetized, its length was found to have increased. What happens to its mass?
A)
It increases. done
clear
B)
It decreases. done
clear
C)
It remains the same. done
clear
D)
It cannot be explained. done
clear
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question_answer28)
Which of the following will be true of 'ash? that is obtained by burning wood in air?
A)
Some properties of ash will not be similar to wood. done
clear
B)
The properties of ash will be similar to wood. done
clear
C)
The properties of ash will be different from both wood and air. done
clear
D)
The properties of ash will be similar to both wood and air. done
clear
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question_answer29)
Which of the following is a physical change?
A)
The rusting of iron nails done
clear
B)
The burning of diesel done
clear
C)
Breaking of a glass bottle done
clear
D)
The heating of iron with sulphur done
clear
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question_answer30)
Which of the following changes caused by heating a substance is irreversible?
A)
Change in size done
clear
B)
Change in state done
clear
C)
Change in colour done
clear
D)
Change in substance done
clear
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question_answer31)
What change is observed when a piece of magnesium wire is burnt?
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Nuclear change done
clear
D)
Both (A) and (B) done
clear
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question_answer32)
Observe the following figures.
Identify the type of change.
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Reversible change done
clear
D)
Periodic change done
clear
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question_answer33)
Which of the following suffers maximum damage due to the rusting of iron?
A)
2 done
clear
B)
1 done
clear
C)
3 done
clear
D)
4 done
clear
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question_answer34)
Read the following statements carefully and then select the correct answer.
1. An Iron ball which can pass through a ring easily may not do so when heated. |
2. When seeds are soaked in water, they absorb water and grow bigger. |
A)
Both the statements 1 and 2 indicate physical changes. done
clear
B)
Both the statements 1 and 2 indicate chemical changes. done
clear
C)
Statement 1 shows a physical change while statement 2 shows a chemical change. done
clear
D)
Statement 1 shows a chemical change while statement 2 shows a physical change. done
clear
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question_answer35)
What change takes place when a boy kicks a football?
A)
Exothermic reaction done
clear
B)
Endothermic reaction done
clear
C)
Physical change done
clear
D)
Chemical change done
clear
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question_answer36)
Three substances given below are kept in the open for a few days.
Which of them will undergo a chemical change?
A)
Eggs done
clear
B)
Plastic bottle done
clear
C)
Both eggs and moth balls done
clear
D)
Eggs, plastic bottle and moth balls done
clear
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question_answer37)
Karuna wrapped some green gram pulses in a wet cotton cloth and when she observed them after a couple of days, she found small white growths on them. What could be this change?
A)
Physical change done
clear
B)
Temporary change done
clear
C)
Chemical change done
clear
D)
Periodic change done
clear
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question_answer38)
On sprinkling salt on an ice cube, it starts melting. What change does the cube of ice undergo?
A)
Physical change done
clear
B)
Chemical change done
clear
C)
Molecular change done
clear
D)
Permanent change done
clear
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question_answer39)
Which of the following changes does food in a refrigerator undergo?
A)
Slow, physical change done
clear
B)
Slow, chemical change done
clear
C)
Fast, chemical change done
clear
D)
Fast, physical change done
clear
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question_answer40)
Which of the following changes results in the formation of a new substance?
A)
Physical done
clear
B)
Chemical done
clear
C)
Reversible done
clear
D)
Periodic done
clear
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