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Chemistry: Material Changes

Total questions: 186

Worksheet time: 2hrs 55mins

Name
Class
Date
1.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
2.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
3.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
4.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
5.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
6.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
7.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
8.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
9.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
10.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
11.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
12.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
13.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
14.
Feels slippery.
a)
Acids
b)
Bases
c)
All
15.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide --> 
a)
Magnesium chloride + water 
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas 
d)
Magnesium chloride + water + carbon dioxide 
16.
The pH scale measures
a)
the acidity of a chemical
b)
the reactivity of a chemical
c)
the boiling point of a chemical
d)
the electrical conductivity of a chemical
17.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
18.
The pH of all acids will be between:
a)
0 - 14
b)
0 - 7
c)
5 - 10
d)
7 - 14
19.
The pH of all alkalis (soluble bases) will be between:
a)
0 - 14
b)
0 - 7
c)
5 - 10
d)
7 - 14
20.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
21.
The pH of a weak base would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
22.
The pH of a weak acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
23.

Why does your toothpaste alkaline?

a)

It can neutralise strong alkaline in

your mouth

b)

It can neutralise acid in

your mouth

c)

It can refresh your teeth

d)

Toothpaste is not alkaline.

24.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
25.

What colour change in universal indicator would you see if you added nitric acid to sodium hydroxide?

a)

red -> blue

b)

purple -> green

c)

red -> yellow

d)

pink -> colourless

26.

Complete the word equation below:

Acid + alkali --> ............... + water

a)

water

b)

salt

c)

gold

d)

metal

27.

.............................. + sodium hydroxide --> sodium chloride + water

a)

Nitric acid

b)

Sulphuric acid

c)

Hydrochloric acid

d)

Ethanoic acid

28.

Bee sting contain ............................ and can be neutralize using bicarbonate soda.

a)

alkali

b)

acid

c)

vinegar

d)

soda

29.

Excess acids in stomach can be neutralized using ............

a)

antacid

b)

vinegar

c)

slaked lime

d)

hydrochloric acid

30.
In a neutralisation reaction, what is the function of the indicator?
a)
To indicate that the mixture is neutral
b)
To indicate that hot water should be added
c)
To indicate that the flask should be shaken
d)
To indicate that a precipitate is formed
31.

Which of the following is a neutralisation reaction?

a)

Potassium hydroxide + calcium nitrate --> Calcium hydroxide + Potassium nitrate

b)

Hydrochloric acid + Sodium hydroxide --> Sodium chloride + water

c)

Hydrochloric acid + Ammonia solution --> Ammonium chloride + water

d)

Sodium hydroxide + calcium chloride --> sodium chloride + calcium hydroxide

32.

Which of the following solutions is suitable to be used to indicate neutralisation between acid and alkali?

a)

Iodine solution

b)

Sodium hydroxide solution

c)

Colour paper

d)

Universal indicator

33.

Which of the following acids do we have in our stomach?

a)

Ethanoic acid

b)

Hydrochloric acid

c)

Nitric acid

d)

Sulphuric acid

34.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

35.

Nitric acid + __________  →\rightarrow  Sodium nitrate + Water

a)

Aluminium oxide

b)

Magnesium hydroxide

c)

Sodium hydroxide

36.

Rain water is slightly acidic. What is its pH?

a)

1.0

b)

5.6

c)

7.0

d)

8.2

37.
a)

PH scale

b)

pH ruler

c)

pH scale

d)

pH statistical tables

38.
Complete the following reaction:
Sulphuric acid + sodium carbonate
--> 
a)
Carbon dioxide + water 
b)
calcium carbonate + water + carbon dioxide 
c)
Sodium sulphate + water + carbon dioxide 
d)
Sodium chloride + water + carbon dioxide 
39.

Complete the following reaction:

Sulphuric acid + magnesium oxide -->

a)

Magnesium sulphate + water

b)

Magnesium + water

c)

Magnesium sulphate + hydrogen

d)

Magnesium sulphate + water + carbon dioxide

40.

Sulphuric acid + potassium hydroxide --> ........................ + water

a)

potassium sulphate

b)

potassium sulphurate

c)

potassium nitrate

d)

magnesium hydroxide

41.
Identify the salt in the following equation:
Zn(OH)2 + HNO3   ---> H2O  + Zn(NO3)2
a)
Zn(OH)2
b)
HNO3
c)
H2O
d)
Zn(NO3)2
42.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

43.
A displacement reaction will occur when...
a)
a more reactive metal displaces a less reactive metal from its compound.
b)
A less reactive metal displaces a more reactive metal from its compound
c)
Displacement only occurs when two of the same metals are reacted 
d)
Displacement reactions will only occur in metals above iron in the reactivity series
44.

Iron + copper oxide ----

a)

Iron + copper oxide

b)

Iron oxide + copper oxide

c)

Iron oxide + copper

d)

No reaction

45.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
46.
An indicator will ______________ when it is in contact with an acid or base
a)
Bubble
b)
Form a new substance
c)
Change color
d)
Stay the same color
47.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
48.
Examine the results (color change) of the pH paper shown in the picture.  What type of substance was tested?
a)
an acid
b)
a base
c)
a neutral substance
d)
none of the above
49.
One drawback of litmus paper is that it
a)
Only tells you if a substance is an acid or a base
b)
is very expensive
c)
is messy
d)
has to be connected to a computer
50.

Which solution can turn phenolphthalein pink?

a)

NaOH(aq)

b)

CH3COOH(aq)

c)

CH2OH(aq)

d)

HCl(aq)

51.

Phenolphthalein has a pink color in a solution that has a pH of

a)

5

b)

11

c)

1

d)

7

52.

Which indicators would cause a solution with a pH of 2 to turn red?

a)

Bromthymol blue and thymol blue

b)

Bromcresol green and litmus

c)

Litmus and methyl orange

d)

Methyl orange and phenolphthalein

53.

Which symbol shows a chemical reaction has occured?

a)

A

b)

B

c)

C

d)

D

54.

Identify the product(s) in this word equation

a)

Sodium

b)

Sodium chloride

c)

Sodium and Chlorine

d)

Sodium and sodium chloride

55.

A physical change is the same as a chemical change

a)

TRUE

b)

FALSE

56.

In a word equation the REACTANTS

a)

Are written on the right hand side of the arrow

b)

Are produced in a chemical reaction

c)

Are always the same

d)

Are the substances that react together

57.

The new substances formed in a chemical reaction are called

a)

Reactants

b)

Atoms

c)

Products

d)

Reagents

58.

What are the reactants in this word equation?

a)

Carbon dioxide and oxygen

b)

Carbon dioxide and water

c)

Oxygen and glucose

d)

Oxygen and water

59.

In a chemical reaction...

a)

New atoms are created

b)

Atoms rearrange

c)

Atoms are destroyed

d)

Nothing Happens

60.

In this chemical reaction zinc is a...

a)

Product

b)

Reactant

c)

Neither

61.

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

a)

A

b)

B

c)

C

d)

D

62.
When a CHEMICAL reaction occurs, what is made?
a)
No new substance is made.
b)
A new substance is made with new atoms formed
c)
A new substance is made, with existing atoms rearranged
d)
All substances remain the same, but physical state may change.
63.
What does this word equation represent: Iron + oxygen → Iron oxide
a)
A physical change in iron (nothing new gets made)
b)
A chemical reactino between iron and oxygen, where rust (iron oxide) is produced
c)
A chemical reaction between iron and rust, where oxygen is produced
d)
A physical change between iron and oxygen that forms a red color
64.

Potassium iodide + lead nitrate --> _____________ + lead iodide


What is missing?

a)

lead nitrate

b)

potassium nitrate

c)

nitrogen

d)

potassium iodide

65.

Magnesium + ________ --> magnesium oxide


What is missing?

a)

Hydrogen

b)

Sulphur

c)

Oxygen

d)

Oxide

66.

Magnesium + hydrochloric acid --> _____________ + hydrogen


What is missing?

a)

Magnesium oxide

b)

Magnesium hydride

c)

Magnesium chloride

d)

Magnesium hydroxide

67.

________________ --> copper oxide + carbon dioxide


What is missing?

a)

copper sulphate

b)

copper nitrate

c)

copper carbonate

d)

copper hydroxide

68.

Sodium + chlorine

a)

sodium chloride

b)

sodium hydroxide

c)

sodium oxide

d)

sodium

69.

Carbon monoxide + oxygen

a)

oxygen gas

b)

Carbon mono oxide

c)

carbon dioxide

d)

water

70.

Diagram shows an investigation about rusting.

R - The iron nail will rust

S -The iron nail not rust

T - The iron nail will float on the water

U- The iron nail will change the colour

Which of the following occur after a day?

a)

R and T

b)

S and T

c)

R and U

d)

S and U

71.

Diagram shows an investigation about rusting.

R - The iron nail will rust.

S - The iron nail will not rust.

T - The iron nail will float on the water.

U- The iron nail will change the colour.

Which of the following occur after a day?

a)

R and T

b)

S and T

c)

R and U

d)

S and U

72.

In which container the nails rust fastest?

a)

A

b)

B

c)

C

d)

D

73.

An experiment has been carried out by a group of pupils. The results of the experiment are recorded in Table 2.


What can be concluded from this experiment?

a)

Nail X did not rust because exposed to the air and water.

b)

Nail Y rust because exposed to the air and water.

c)

Nail X did not rust because exposed to the oil layer.

d)

Nail Z did not rust because exposed to water.

74.

Objects that rust made of

a)

aluminium

b)

gold

c)

metal

d)

plastic

75.

A layer of reddish brown on surface of a metal is called

a)

red paint

b)

red dirt

c)

rust

d)

brown rust

76.

What are the factors that causes rusting

a)

presence of water and oil

b)

presence of water and carbon dioxide

c)

presence of boiled water and oxygen

d)

presence of water and oxygen

77.

Rusting happens more faster when the humidity is high.

a)

True

b)

False

78.

How do you prevent cycle chain from rusting?

a)

apply oil or grese

b)

painting

c)

plating iron with a layer of non rusty metals

d)

coating with plastic

79.

Which nails will rust after one week?

a)

A

b)

B

c)

C

d)

D

80.

What is the function of the oil layer in test tube C?

a)

prevent the air from going out

b)

prevent air going inside

c)

absorbs the air in the water

d)

protect the nail from rusting

81.

Does boiled water contain air?

a)

Yes

b)

No

82.

Which metal rusts?

a)

Copper

b)

manganese

c)

iron

d)

potassium

83.

What prevents rusting?

a)

Painting, Oiling, Galvanizing

b)

Washing with water

c)

Leaving it outside

d)

Adding salt

84.

What is the chemical name given to rust?

a)

Iron dioxide

b)

Iron oxide

c)

Steel oxide

d)

Carbon dioxide

85.

Which of the following does NOT prevent iron from rusting?

a)

Painting over all the iron

b)

Attaching the iron to a piece of copper

c)

Oiling the iron

d)

covering the iron entirely with copper

86.

Rusting is a reversible change.

a)

True

b)

False

87.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

88.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
89.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

90.

1. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

a)

A. temperature rises by 3 °C\degree C    

b)

B. temperature falls by 5 °C\degree C   

c)

C. temperature falls by 3 °C\degree C    

d)

D. temperature rises by 5 °C\degree C  

91.

4. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the least endothermic?

a)

A. temperature falls by 3 °C\degree C    

b)

B. temperature rises by 5 °C\degree C

c)

C. temperature falls by 5 °C\degree C

d)

D. temperature rises by 3 °C\degree C

92.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
93.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
94.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
95.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
96.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

97.

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

a)

A. exothermic    

b)

 B. activated  

c)

C. decomposition            

d)

D. endothermic

98.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

99.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

100.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

101.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
102.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

103.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
bubbles of gas appear
d)
dissolving
104.

When people get injured in sport cool packs are provided. Cool packs are an example of what type of reaction?

a)

Endothermic

b)

Exothermic

105.

Self heating cans were very popular in the UK in the late 1990s. The reaction between Water and Calcium Oxide resulted in Calcium Hydroxide and heat being produced. What type of reaction is this?

a)

Exothermic

b)

Endothermic

106.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

107.

Which of these metals is the most reactive?

a)

Iron

b)

Copper

c)

Tin

d)

Aluminium

108.

Acids react with metals to form ___________.

a)

oxygen and water

b)

rust

c)

salt and water

d)

salt and hydrogen

109.

Rusting occurs when ________.

a)

iron reacts with water and nitrogen

b)

iron reacts with water and oxygen

c)

oxygen reacts with iron

d)

water reacts with metal

110.

Which of these metals is the least reactive?

a)

Tin

b)

Zinc

c)

Magnesium

d)

Aluminium

111.

ACID + OXIDE -->

a)

SALT

b)

SALT + HYDROGEN

c)

SALT + WATER

d)

WATER

112.

When making copper sulphate, why is copper oxide added to excess?

a)

Make sure all the copper oxide reacts

b)

Make sure all the acid reacts

c)

So it can be filtered

d)

So it evaporates

113.

Gas produced when a carbonate reacts with an acid

a)

oxygen

b)

hydrogen

c)

carbon dioxide

d)

nitrogen

114.

Group 7 elements are called..

a)

halogens

b)

alkali metals

c)

noble gases

d)

transition metals

115.

Going DOWN Group 7...

a)

the number of protons decreases

b)

reactivity increases

c)

the atoms get smaller

d)

reactivity decreases

116.

Going DOWN Group 1...

a)

reactivity decreases

b)

the atoms get smaller

c)

the ions have a greater charge

d)

reactivity increases

117.

Which is the least reactive?

a)

aluminium

b)

silver

c)

calcium

d)

potassium

118.

What would you SEE if you reacted:

magnesium + copper sulphate

a)

solution turns blue

b)

nothing

c)

gas given off

d)

orange / brown substance forming

119.

zinc + iron sulphate --> zinc sulphate + iron

What type of reaction is this?

a)

neutralisation

b)

displacement

120.

Complete the word equation below.


Magnesium + oxygen --> .....

a)

Magnesium

b)

Magnesium oxide

c)

Oxides

d)

Magnesium oxide + water

121.
When a metal reacts with oxygen gas, the product is ...
a)
metal hydroxide
b)
metal oxide
c)
metal oxide and oxygen
d)
metal hydroxide and hydrogen gas
122.
The least reactive in oxygen in the list is 
a)
iron
b)
zinc
c)
copper
d)
lead
123.
Which metal is more reactive than calcium?
a)
magnesium
b)
potassium
c)
silver
d)
aluminum
124.
Which one of the following metals reacts most vigorously with cold water?
a)
Sodium
b)
Magnesium
c)
Copper
d)
Zinc
125.

What are the two non-metals that are included in the reactivity series of metals?

a)

Hydrogen and iron

b)

Oxygen and lead

c)

Tin and carbon

d)

Carbon and hydrogen

126.

What does displacement mean?

a)

A chemical reaction where a less reactive metal takes the place of a more reactive metal in a compound.

b)

A chemical reaction where a more reactive metal takes the place of a less reactive metal in a compound.

c)

A more reactive metal is removed from a compound.

127.
Which equation correctly shows the displacement of copper by zinc?
a)
copper + zinc sulphate --> copper sulfate + zinc
b)
zinc sulphate + copper --> copper sulfate + zinc
c)
copper sulfate + zinc --> zinc sulfate + copper
128.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

129.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
130.

What is produced when magnesium reacts with water?

a)
Copper hydroxide
b)
Magnesium oxide
c)

Magnesium chloride

d)
Magnesium hydroxide
131.

Arrange the steps below in order to see the reaction of calcium and cold water.

            P - bubbles will be produced and water become cloudy

            Q - put the lighten splint at the mouth of the tube and heard the pop sound

            R - calcium sinks in the cold water

            S - collect gas by placing a test tube filled with water over the fizzing metal

a)

P > Q > R > S

b)

Q > P > S > R

c)

R > P > S > Q

d)

R > S > P > Q

132.

Ahmad wants to investigate the reaction of metal with acid. Which of the following do you think is the best combination for the reaction?

a)

Potassium and concentrated hydrochloric acid

b)

Magnesium and dilute hydrochloric acid

c)

Gold and concentrated hydrochloric acid

d)

Copper and dilute hydrochloric acid

133.

Iron nail was placed in a copper sulfate solution.

What will happen in the reaction?

a)

Copper will dissolve and form a pale blue solution

b)

Iron will dissolve and form iron sulfate solution

c)

Both iron and copper will react in the solution

d)

No reaction will occurred in the solution

134.

According to the reactivity series, sodium and potassium were the top two elements for each type of reaction. Which of the following best describes the metals?

a)

Both metal has a stable electron figuration

b)

Both metal are transition metal

c)

Both metal are reactive metal

d)

Both metal produced same reaction

135.

Copper wire was placed in a magnesium sulfate solution.

What will happen in the reaction?

a)

Copper will dissolve and form copper sulfate

b)

Magnesium will dissolve and form copper comes out from the solution

c)

Both copper and magnesium will react in the solution

d)

No reaction will occurred in the solution

136.

In a displacement reaction, it is the ____________ reactive metal that is displaced from a compound.

a)

Heaviest

b)

Least

c)

Most

d)

Worst

137.

Use the following observations to select the correct reactivity series (highest to lowest).


calcium + water: slow

sodium + water: fast

calcium + dilute acid: very fast

gold + dilute acid: no reaction

aluminium + dilute acid: fast

a)

calcium, sodium, aluminium, gold

b)

sodium, calcium, aluminium, gold

c)

sodium, aluminium, calcium, gold

d)

gold, aluminium, calcium, sodium

138.

An alloy is a mixture of a metal and one or more _________

a)

elements

b)

compounds

c)

atoms

d)

molecules

139.

Complete the following word equation:

Metal + Acid -->

a)

Salt + water

b)

Salt + hydrogen

c)

Salt + Water + Carbon dioxide

140.

Complete the following word equation:

Metalcarbonate + acid -->

a)

Salt + Hydrogen

b)

Salt + Water + Carbon Dioxide

c)

Salt + Water

141.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

142.

What is the symbol for Copper?

a)

C

b)

co

c)

Cu

d)

CU

143.

What is the symbol for carbonate?

a)

CO

b)

CO2

c)

CO3

144.

What is the name of the practical technique to neutralise an alkali?

a)

Neutralisation

b)

Titration

c)

Using a burette

d)

Telestration

145.

What does the word insoluble mean?

a)

Does dissolve

b)

Doesn't dissolve

c)

Is part of a solid

146.

What colour does the solution turn when sulfuric acid is added to copper carbonate?

a)

Blue

b)

Green

c)

Clear

d)

Purple

147.
Salts that are made with hydrochloric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
148.
Salts that are made with sulfuric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
149.
Salts that are made with nitric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
150.
What salt is produced if you react sodium hydroxide with hydrochloric acid?
a)
sodium hydroxide
b)
sodium sulfate
c)
sodium nitrate
d)
sodium chloride
151.

How do you separate an excess insoluble reactant from a solution?

a)

Filtration

b)

Precipitation

c)

Crystalisation

d)

Evaporation

152.

Which two chemicals could you react to make only potassium chloride and water?

a)

Potassium and hydrochloric acid

b)

Potassium hydroxide and hydrochloric acid

c)

Potassium oxide and sulfuric acid

d)

Potassium and sulfuric acid

153.

_________________ + nitric acid --> calcium nitrate + water

a)

calcium sulfate

b)

calcium oxide

c)

calcium carbonate

d)

calcium

154.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
155.

Which factors affect the rate of a reaction?

a)

temperature

b)

concentration

c)

size

d)

pressure

e)

catalyst

156.

Increase in temperature causes the particles to

a)

slow down

b)

move faster

c)

stay apart from each other

d)

move in the correct order

157.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of reactant particles

d)

it increases the frequency of collision

158.

Why does a higher temperature increase the rate of a reaction?

a)

It increases both the frequency collision and energy of reactant particles

b)

It only increases the frequency of collision

c)

It only increases the energy of reactant particles

d)

It reduces the activation energy of the reaction

159.

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

a)

concentration

b)

total surface area

c)

temperature

d)

size

160.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing total surface area

d)

All of these

161.

Increasing the temperature gives particles more __________.

a)

time

b)

energy

c)

space

d)

frequency

162.

Why does breaking up a solid reactant increase the rate of reaction?

a)

it creates more solid

b)

it creates more energy

c)

it increases the total surface area

d)

it increases the concentration

163.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of collisions

164.

How could we make this reaction happen more quickly?

a)

Decrease the concentration of the acid

b)

crush the chalk to increase the surface area

c)

Put the test tube in an ice bath

165.
Order the letters from highest to lowest rate of reaction.
a)
A > B > C > D
b)
A > BC > D (B and C have the same rate)
c)
A > B > CD (C and D have the same rate)
d)
D > C > B > A
166.

Which of the following is a clue that a chemical change has occurred? (Choose all correct answers.)

a)

Formation of a gas (bubbles)

b)

Color change

c)

Phase change

d)

Produces light or heat

167.

On a camping trip, Mr. Markowitz roasts a marshmallow in the campfire. He notices that the roasted marshmallow smells and tastes differently than the uncooked marshmallows. What change has taken place AND how does Mr. Markowitz know?

a)

A chemical change because the marshmallow changed in taste, color, and smell

b)

A chemical change because the marshmallow was heated up.

c)

Only a physical change because the marshmallow changed in size

d)

No change because the marshmallow is not a new substance

168.
Which of the following IS a clue that a chemical change has occurred? 
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
169.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

170.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
171.

Which of the following does not affect the rate of reaction?

a)

concentration of solution

b)

using a catalyst

c)

color of the solution

172.

Which of the following does not affect the rate of reaction?

a)

temperature of solution

b)

surface area of substance

c)

the day the chemical is mixed

173.

What happen to catalyst after a chemical reaction?

a)

it is used up

b)

it become larger

c)

it remain unchanged

174.

Magnesium reacts with hydrochloric acid. Which concentration of hydrochloric acid produce higher rate of reaction?

a)

0.5 g/dm3

b)

1.5 g/dm3

c)

2.5 g/dm3

175.

Magnesium reacts with hydrochloric acid. Which magnesium will produce higher rate of reaction?

a)

large one piece metal

b)

crushed into powder

c)

cut into ten pieces

176.

Magnesium reacts with hydrochloric acid. Which temperature of hydrochloric acid will produce higher rate of reaction?

a)

20 OC

b)

40 OC

c)

60 OC

177.

Which of the following does not happen when catalyst is added to a chemical?

a)

Rate of chemical reaction increases

b)

Catalyst remain unchanged

c)

Size of catalyst increases

178.

What instrument are needed to measure the speed of reaction?

a)

Stopwatch or clock

b)

Thermometer

c)

Gas syringe

179.

The graph shows two experiment done in different temperature of chemical.

What does the graph tells us?

a)

Experiment A have higher rate of reaction

b)

Experiment B have higher rate of reaction

c)

Experiment A and B have the same rate of reaction

180.

The graph shows two experiment done in different temperature of chemical.

How do we know experiment A have higher rate of reaction?

a)

Experiment A have a steep graph

b)

Experiment A have a flat graph towards the end

c)

Experiment A is labelled in red

181.

The graph shows two experiment done in different temperature of chemical.

What does the graph tells us?

a)

The higher the temperature of chemical, the higher the rate of reaction

b)

The higher the temperature of chemical, the higher amount of gas produced

c)

The higher the temperature of chemical, the longer it takes to complete the reaction

182.

A chemical reaction causes a color change and become opaque after a few minute.

How do we find the rate of reaction?

a)

Find out which one become opaque faster

b)

Find out which one become opaque slower

c)

Find out which one change temperature faster

d)

Find out which one change temperature slower

183.

Which of the following is the proper practical method when measuring rate of chemical reaction that change color? (Pick 3 answers)

a)

Put a mark under the beaker containing the chemicals

b)

Look at the mark from above the beaker

c)

Look at the mark from below the beaker

d)

Measure the temperature until we cannot see the mark.

e)

Measure the time until we cannot see the mark.

184.

Which experiment have higher rate of reaction?

a)

Experiment 5

b)

Experiment 1

c)

Experiment 2

d)

Experiment 3

e)

Experiment 4

185.

How do we know experiment 5 have higher rate of reaction?

a)

It take shorter time to become opaque

b)

It have higher concentration of sodium thiosulfate

c)

It take longer time to become opaque

186.

What does the experiment tells us?

a)

The higher the concentration of solution, the higher the rate of reaction

b)

The higher the concentration of solution, the solution become more opaque

c)

The higher the concentration of solution, the more experiment take place

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