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CHEM - Acids Bases and Displacement

Total questions: 65

Worksheet time: 59mins

Name
Class
Date
1.

Which of the following metals will react with dilute acid?

a)

iron

b)

copper

c)

silver

d)

gold

2.

Which of the following reactions will not produce a gas?

a)

calcium carbonate + ethanoic acid

b)

barium oxide + citric acid

c)

ammonium sulfate + sodium hydroxide

d)

magnesium + sulfuric acid

3.

A gas produced from a reaction was bubbled into limewater. A white precipitate was formed.


What is the formula of the white precipitate?

a)

Ca(OH)2

b)

CaO

c)

CaCO3

d)

CO2

4.

Which of the following is not a use of sulfuric acid?

a)

fertiliser

b)

detergent

c)

in car batteries

d)

food preservative

5.

Which of the following statements must be true for all acids in aqueous solution?

a)

Their pH value is less than 7.

b)

They completely ionise to produce hydrogen ions.

c)

They react with all metals to produce hydrogen gas.

d)

Dibasic acids are stronger than monobasic acids.

6.

An accident occurred in a school chemistry laboratory and some nitric acid was spilled. Which substance, when added in excess, will neutralise the acid without leaving behind an alkaline solution?

a)

Aqueous ammonia

b)

Calcium carbonate

c)

Sodium hydroxide

d)

Water

7.

Which of the following statements about aqueous calcium hydroxide are true? (multiple answers)

a)

It conducts electricity.

b)

It turns Universal Indicator red.

c)

It liberates ammonia gas when heated with an ammonium salt.

d)

It liberates carbon dioxide when reacted with aqueous sodium carbonate.

8.

Which of the following is a neutralization reaction?

a)

2H2 + O2 → 2H2O

b)

KCl + AgNO3 → AgCl + KNO3

c)

KOH + HCl → KCl + H2O

d)

K2CO3 + H2SO4 → K2SO4 + CO2 + H2O

9.

Which two substances react to produce a salt and water only? (multiple answers)

a)

magnesium & hydrochloric acid

b)

magnesium carbonate & hydrochloric acid

c)

magnesium hydroxide & hydrochloric acid

d)

magnesium oxide & hydrochloric acid

10.

Which statement DOES NOT describe a property of a weak acid in solution?

a)

It forms a salt with sodium hydroxide.

b)

It has a pH of between 8 and 9.

c)

It only partially ionises to form hydrogen ions when dissolved in water.

d)

It reacts with sodium carbonate to produce carbon dioxide gas.

11.

Which of the above acids would have the lowest pH when dissolved in water?

a)

ethanoic acid

b)

citric acid

c)

hydrochloric acid

d)

sulfuric acid

12.

Which of the following are characteristics of a base?

a)

Sour taste

b)

Bitter taste

c)

pH of 1-6.9

d)

pH of 7.1-14

e)

feels slippery

13.
What does pH measure?
a)
Amount of Oxygen Ions
b)
Amount of Hydrogen Ions
c)
The amount of salt in a solution
d)
The density
14.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
15.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

16.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
17.

KOH is ...

a)

an acid

b)

a base

c)

a salt

d)

an ionic compound

18.

What is a titration?

a)

when the moles of hydrogen ions is equal to the moles of hydroxide ions

b)

adding a known amount of solution of known concentration to determine the concentration of an unknown

c)

reaction in which an acid and a base react in an aqueous solution to produce a salt and water

d)

the extent of ionization of an acid or base

19.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

c)

saline

d)

ionic

20.

What completely ionizes in solution?

a)

Weak acids

b)

Strong acids

c)

Strong Salts

d)

Neutral salts

21.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

22.

When acids react with metals, they produce hydrogen gas and salt.

a)

True

b)

False

23.

Which of the following are properties of acids?

a)

They conduct electricity when dissolved in water

b)

They taste sour

c)

They react with metals to produce hydrogen gas

d)

All of the answer choices are correct

24.

Which of the following is an acid?

a)

vinegar

b)

bleach

c)

sugar in water

d)

starch in water

e)

toothpaste in water

25.

The pH value of an acid represents its __________ of positive ions in the solution

a)

amount

b)

concentration

c)

color

d)

charge

26.

Bases have many uses. They are mainly used to make

a)

cleaning products

b)

soaps

c)

concrete

d)

all of the answer choices

27.

Which of the following is a base?

a)

baking soda in water

b)

orange juice

c)

vinegar

d)

lemonade

28.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
29.
Explain what happens when a strong acid and a strong base are poured into the same container.
a)
they form separate layers
b)
they mix physically but not chemically
c)
they break apart into separate elements
d)
they react chemically to form a salt
30.

Which type of ion does an acid produce when it is dissolved in water?

a)

oxide

b)

oxygen

c)

hydronium

d)

hydroxide

31.

When an equal strength acid and base are mixed, what kind of chemical reaction occurs?

a)

Neutralization

b)

Combustion

c)

Oxdation

d)

Decomposition

32.
Explain what happens when a strong acid and a strong base are poured into the same container.
a)
they form separate layers
b)
they mix physically but not chemically
c)
they break apart into separate elements
d)
they react chemically to form a salt
33.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
34.
Williams collected a rain sample and measured its pH to be 5.6.  What does this mean?
a)
the rain water is a weak base
b)
the rain water is neutral
c)
the rain water is a strong acid
d)
the rain water is a weak acid
35.
Which of the following is most likely to be basic:
a)
Lemon juice
b)
Vinegar
c)
Laundry detergent
d)
Coke
36.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
37.
Why are bases useful as cleaning products?
a)
They dissolve fats and oils
b)
they are corrosive, so they eat anything
c)
they don't mix with water
d)
since bases are slippery, they slip dirt off of surfaces
38.
A decomposition reaction can be represented as _____________________.
a)
AB  → A + B
b)
A + B → AB
c)
AB + CD → AC + BD
d)
A + BC → B + AC
39.
A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.
a)
single-replacement reaction
b)
synthesis reaction
c)
double-replacement reaction
d)
decomposition reaction
40.
This chemical equation for mercury oxide is an example of what type of reaction?
2HgO  → 2Hg + O2
a)
decomposition reaction
b)
synthesis reaction
c)
combustion reaction
d)
Marvin the Martian reaction
41.
Choose the balanced chemical equation for the formation of iron oxide.
a)
2Fe + O2 → 2FeO2
b)
Fe + O2 → FeO2
c)
4Fe + 3O2 → 2Fe2O3
d)
4Fe + O2 → 2FeO2
42.
A chemical change in which two or more substances react to form a new substance is a ____________________________.
a)
decomposition reaction
b)
synthesis reaction
c)
double displacement reaction
d)
combustion reaction
43.
A synthesis reaction can be represented as ________________________.
a)
AB + CD → AC + BD
b)
AB → A + B
c)
A + B → AB
d)
A + BC → B + AC
44.
This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O2  → 2MgO
a)
decomposition reaction
b)
synthesis reaction
c)
single displacement reaction
d)
combustion reaction
45.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
46.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
47.
Which coefficients are required to correctly balance the equation: 
C2S2 + O2 → CO2 + S2O
a)
1, 2, 3, 2
b)
2, 5, 4, 2 
c)
2, 4, 5, 2
d)
2, 3, 5, 2 
48.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
49.

Which of the following the most reactive in dilute acid

a)

magnesium

b)

calcium

c)

aluminum

d)

zinc

50.
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
51.
The least reactive in oxygen in the list is 
a)
iron
b)
zinc
c)
copper
d)
lead
52.
Which one of the following metals reacts most vigorously with cold water?
a)
Sodium
b)
Magnesium
c)
Copper
d)
Zinc
53.
When sodium reacts with hydrochloric acid, what is the name of the salt formed?
a)
Sodium Hydride
b)
Sodium Chloride
c)
Sodium Hydrochloric
d)
Sodium Chlorine
54.
When potassium reacts with sulphuric acid, what is the name of the salt produced?
a)
Potassium Sulphide
b)
Potassium Sulphur
c)
Potassium Sulphuric
d)
Potassium Sulphate
55.

Copper is less reactive than iron. What do you expect to happen when copper is placed inside a solution of iron(II) sulfate?

a)

No reaction takes place.

b)

A reaction takes place. And a colour change is observed.

56.

A more reactive metal will displace a less reactive metal from a metal compound. Which metal is more reactive - copper or iron?

a)

copper

b)

iron

57.

Metal A is more reactive than Metal B. The following displacement reaction takes place.


Metal A + Metal B in compound ---> Metal B + Metal A in compound.


True or False.

a)

True

b)

False

58.

Which equation correctly shows the displacement of copper from copper(II) sulfate by zinc?

a)

copper + zinc sulfate --> copper(II) sulfate + zinc

b)

zinc sulfate + copper --> copper(II) sulfate + zinc

c)

copper(II) sulfate + zinc --> zinc sulfate + copper

d)

copper(II) sulfate + zinc --> zinc sulfate + water

59.

Which equation correctly shows magnesium displacing copper from it copper(II) sulfate?

a)

2Mg + O2 --> 2MgO

b)

Mg + CuSO4 --> MgSO4 + Cu

c)

Mg + MgSO4 --> MgSO4 + Mg

60.

Aluminium is more reactive than ....

a)

Calcium and Zinc

b)

Sodium and Gold

c)

Magnesium and Copper

d)

Lead and Iron

61.

Which metal reacts fastest with acid?

a)

Copper

b)

Iron

c)

Zinc

d)

Magnesium

62.
Acid + Metal --> ?
a)
Salt + Water
b)
Salt + Hydrogen
c)
Salt
d)
Hydrogen
63.

Lithium chloride + Iron → ?

a)

Lithium chloride + Iron (No change)

b)

Iron chloride + Lithium

c)

Lithium oxide + hydrogen

64.
Which equation correctly shows the reaction of zinc with oxygen?
a)
Zn + O --> ZnO
b)
Zn + O2 --> ZnO
c)
2Zn + O2 --> 2ZnO
d)
Zn + O2 --> 2ZnO
65.
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

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