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Physical and chemical change

Total questions: 88

Worksheet time: 3hrs 56mins

Name
Class
Date
1.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
2.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

3.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
4.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
5.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
6.

Change in color is a physical change.

a)

True

b)

False

7.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
8.

Rust on an iron bar is an example of chemical change.

a)

True

b)

False

9.

When you break a cracker into pieces it is a...

a)

Chemical change

b)

Physical change

10.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
11.
Dissolving sugar in water is an example of a 
a)
physical change
b)
chemical change
12.
Digesting your food is an example of 
a)
chemical change
b)
physical change
13.

The melting of wax is an example of a

a)

chemical change

b)

physical change

14.

Cutting a log in to small pieces is a chemical change.

a)

true

b)

false

15.
Which is an example of a chemical reaction?
a)
paper cut into small pieces
b)
chocolate melting in a pan
c)
flour and sugar mixed in a bowl
d)
cookies baking in an oven
16.
Exploding Fireworks?
a)
Physical Change 
b)
Chemical Change 
17.
Rotting bananas?
a)
Physical Change
b)
Chemical Change
18.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
19.
Is sqeezing organges to make orange juice a phyical or chemcial change?
a)
physical
b)
chemical
20.
If enough heat is taken away from a container of water, what will happen to the water?
a)
It will begin to boil.
b)
It will become a solid.
c)
It will turn into a gas.
d)
It will increase in weight.
21.
What happens when a piece of wood burns?
a)
A physical change takes place.
b)
A chemical change takes place.
c)
The wood loses its gravity.
d)
The wood loses its inertia.
22.
Which answer makes a correct statement?
a)
Physical change only changes the size.
b)
Physical change only changes the color.
c)
Physical changes begin and end with the same matter.
d)
Physical changes change the matter into something total different.
23.
The diagram below shows changes happening to water in a specially shaped bottle.
What changes did the water undergo?
a)
melting and then freezing
b)
freezing and then evaporation
c)
condensation and then melting
d)
evaporation and then condensation
24.
Which action would cause the weight of an object or substance to decrease?
a)
stirring it
b)
burning it
c)
freezing it
d)
dissolving it
25.
A change that does not result in a new substance.
a)
Physical Change
b)
Chemical Change 
26.
A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?
a)
cutting a piece of paper
b)
folding a piece of paper
c)
tearing a piece of paper
d)
burning a piece of paper
27.
A group of students investigated physical and chemical changes using paper.  The students recorded their observations in a table.
Which student correctly recorded all the changes that took place?
a)
Student 1
b)
Student 2
c)
Student 3
d)
Student 4
28.
A change that alters the physical properties of a substance without changing its composition.
a)
Physical Change
b)
Chemical Change
29.
Which of the following indicates a chemical change?
a)
Change in state of matter
b)
Temperature change
c)
Change in size 
d)
Change in shape
30.
Which of the following DOES NOT indicate a chemical change/reaction is occurring?
a)
Color Change
b)
Formation of a Precipitate
c)
Formation of gas/bubbles
d)
State of matter change
31.
Which of the following indicates a PHYSICAL change?
a)
Change in temperature
b)
Change in shape
c)
Formation of a precipitate
d)
Change in color
32.
Chemical or Physical?  Glass breaking into tiny shards
a)
Chemical Change
b)
Physical Change
33.

A physical change...

a)

changes the physical properties of an object, but does not create a new substance.

b)

creates a new substance and cannot be undone.

34.

A chemical change

a)

changes the physical properties of an object, but does not create a new substance.

b)

creates a new substance and cannot be undone.

35.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

36.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

37.
A chemical reaction accompanied by the absorption of heat. 
a)
Chemical Change
b)
Physical Change
c)
Endothermic Reaction
d)
Exothermic Reaction 
38.
A cold pack made with Ammonium Chloride is and example of a __________ reaction. 
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Mesothermic Reaction
d)
Misothermic Reaction
39.
A chemical reaction accompanied by the releasing of heat. 
a)
Endothermic
b)
Exothermic
c)
Mesothermic
d)
Misothermic
40.
A hot hand pack is an example of a _______________ reaction. 
a)
Endothermic
b)
Exothermic
c)
Mesothermic
d)
Misothermic
41.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
42.
Blue liquid and yellow liquid mixed to make a green liquid
a)
Chemical Change
b)
Physical Change
43.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
44.
Light used to produce food in plants
a)
Chemical Change
b)
Physical Change
45.
Which statement best describes why baking a cake is an example of a chemical change?
a)
The process takes place in an oven.
b)
The process requires heat energy.
c)
The process cannot be reversed.
d)
The process can be repeated.
46.
Stanley left an ice cube on his kitchen counter. An hour later, Stanley observed that the ice cube melted. Which statement best describes this change?
a)
Ice melting is a physical change because a new substance is created.
b)
Ice melting is a chemical change because a new substance is created.
c)
Ice melting is a chemical change because it may be reversed.
d)
Ice melting is a physical change because it may be reversed.
47.

Chemical changes...

a)

Always form a new substance.

b)

May change shape or size.

c)

May absorb or release heat.

d)

May change colour, produce odor, create sound, release gas or produce light.

e)

Can often be undone.

48.

Physical Changes...

a)

Do not form a new substance.

b)

May change shape or size.

c)

May absorb or release heat.

d)

May change state of matter.

e)

Can often be undone.

49.

Cooking an egg is a..

a)

Irreversible

b)

Reversible

c)

Changes

50.

Melting chocolate is a....

a)

Irreversible

b)

Reversible

c)

Changes

51.

The change happening in the picture is...

a)

Irreversible

b)

Reversible

c)

Changes

52.

What change is happening within this picture?

a)

Reversible

b)

Irreversible

53.

When orange juice is frozen to make popsicles, can the popsicles change back to orange juice?

a)

Yes

b)

No

54.

Which of these is NOT an irreversible change?

a)

Burning

b)

Melting

c)

Rusting

55.

The changes that occur over a long period of time are called

a)

Organism

b)

Slow changes

c)

Fruit

d)

Growth

56.

_______ changes are defined as the changes that are usefull to us

a)

Contraction

b)

Undesirable

c)

Desirable

57.

A example of undesirable change

a)

A person falling sick

b)

People dancing on stage

58.

The changes that repeat themselves after a certain period of time

a)

Reversible change

b)

desirable change

c)

Periodic change

d)

Non periodic change

59.

Spoilage of food is an example of

a)

Desirable change

b)

Reversible change

c)

Non periodic change

d)

Undesirable change

60.

Change of day into night is an example of

a)

Man made change

b)

Desirable change

c)

Natural change

d)

Fast change

61.

The changes that are not useful and can be harmful for mankind

a)

Reversible change

b)

Periodic change

c)

Desirable change

d)

Undesirable change

62.

All reversible changes are physical. But all physical changes are not reversible.

a)

True

b)

False

63.

Select the example of desired changes

(i) Ripening of fruits. (ii) Rotting of fruits (iii) Rain  (iv) Floods

a)

(i) and (ii)

b)

(i)and (iii)

c)

(ii) and (iii)

d)

(iii) and (iv)

64.

Select the non-periodic changes from the given examples.

a)

Occurrence of day and night

b)

Earthquakes

c)

Migration of birds  

d)

Flash Floods

65.

Lightning a bulb is an example of

a)

Slow Change

b)

Fast Change

c)

Periodic Change

d)

Desirable Change

66.

bursting of firecrackers is an example of ___ While Drying of clothes is an example of ___

a)

Desirable and Undesirable

b)

Physical, Chemical

c)

Chemical, Physical

d)

None of these

67.

On heating Ammonium Chloride the products formed are

a)

Ammonia

b)

Carbon

c)

Oxygen, Carbon dioxide

d)

Ammonia and hydrogen chloride

68.

Change of weather is an example of

a)

Physical change

b)

Periodic Change

c)

Non Periodic Change

d)

None of these

69.

when magnesium ribbon burnt it produce

a)

magnesium hydroxide

b)

Magnesium oxide

c)

magnesium chloride

d)

magnesium sulphate

70.

In a chemical reaction between Sulphuric acid and Barium chloride solution the white precipitates formed are of:

a)

a. Hydrochloric acid

b)

b. Barium sulphate

c)

c. Chlorine

d)

d. Sulphur

71.

4. It is necessary to balance a chemical equation in order to satisfy the law of:

a)

a. Conservation of motion

b)

b. Conservation of momentum

c)

c. Conservation of energy

d)

d. Conservation of mass

72.

6. When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:

a)

a. Blue to green.

b)

b. Green to blue.

c)

c. Green to brown.

d)

d. Green to yellow.

73.

One of the following processes does not involve a chemical reaction. That is:

a)

Melting of candle wax when heated

b)

Burning of candle wax when heated

c)

Digestion of food in our stomach

d)

Ripening of banana

74.

Which of the following is termed as rancidity?

a)

Reduction of oxygen present in food

b)

Oxidation of sugar present in food

c)

Oxidation of oil present in food

d)

All of the above

75.

Which Of The Following Sentences Is Or Are Correct?

a)

Rusting is a chemical change because a new substance is formed

b)

Beating of Aluminum metal to make Aluminum foil, is a physical change

c)

Digestion of food is a chemical change

d)

All the above

76.

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

77.

Both oxygen and water are essential for rusting.

a)

TRUE

b)

FALSE

78.

Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

a)

It is more than 7 metres high

b)

It weighs about 6000 kg

c)

It was built more than 1600 years ago

d)

It has not rusted after such a long period

79.

When we add ashes of magnesium ribbon to water it will give

a)

Acidic solution

b)

Basic solution

80.

What is the chemical name given to Rust ?

a)

Iron dioxide

b)

Iron oxide

c)

Steel oxide

d)

Carbon dioxide

81.

when we add iron to copper sulphate solution, the colour of the solution changes from blue to __________

a)

Green

b)

Red

c)

Colourless

d)

No colour change

82.

Which of the following is an extensive physical property?

a)

Colour

b)

Mass

c)

Melting point

d)

Density

83.
Can a same substance undergo both physical and chemical changes.
a)
True
b)
False
84.
Which best explains why burning leaves is a chemical change?
a)
The leaves emit light during the change. 
b)
The temperature of the leaves increases.
c)
The shape of the leaves changes.
d)
The leaves turn to ashes.
85.

When magnesium reacts with hydrochloric acid, gas are given off. The gas is .......

a)

Oxygen

b)

Hydrogen

c)

Carbon dioxide

d)

Carbon monoxide

86.

Analyze the picture. What type of change happened? What is the evidence shown? Under what condition does this happen?

a)

chemical change; change in size; application of heat

b)

physical change; change in phase; presence of oxygen

c)

physical change; change in phase; application of heat

d)

chemical change; change in state; absorption of heat

87.

Analyze the picture. What type of change happened? What is the evidence shown? Under what condition does this happen?

a)

chemical change; change in color; presence of oxygen

b)

physical change; change in color; absence of oxygen

c)

chemical change; release of gas; presence of oxygen

d)

physical change; change in color; presence of oxygen

88.
Phase change from a solid to a gas.
a)
sublimation
b)
deposition
c)
condensation
d)
evaporation

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