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acids, bases and salts

Total questions: 84

Worksheet time: 4hrs 10mins

Name
Class
Date
1.
An acid 
a)
Formed from joining positive and negative ions
b)
increases OH ions
c)
forms a salt and water
d)
increases H2O ions
2.
Bases
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
3.
Salts
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
4.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
5.
Which of the following is a chemical property of a base
a)
a slippery feel
b)
conducts an electric current
c)
turns red litmus paper blue
d)
forms hydronium ions in water
6.
Which of the following is a salt: ammonia or sodium chloride?
a)
ammonia 
b)
sodium chloride
7.
Most foods are 
a)
Acid
b)
Basic
c)
Neutral
d)
salts
8.
The difference between a strong and weak acid is: 
a)
Strong acids stay intact in water weak acids don't 
b)
Strong acids are slippery weak acids aren't
c)
Strong acids break apart in water. Weak acids stay intact
d)
Weak acids break apart in water most of the time, strong acids do all of the time. 
9.
A salt is formed when nitric acid combines with sodium hydroxide. What are present in the salt that forms?
a)
Sodium chloride
b)
sodium ions and nitrate ions
c)
only sodium ions
d)
only nitrate ions
10.
Pickles form by soaking in an acid. What are some properties of pickles
a)
Conducts electricity, bitter, turns litmus blue
b)
Slippery, sour, turns litmus blue
c)
Slippery, bitter, turns litmus blue
d)
Sour, turns litmus red, can conduct electricity
11.
Why does vinegar help preserve things like pickles? 
a)
It keeps moisture in. 
b)
It preserves flavors and crispness
c)
It kills bacteria that break down foods. 
d)
It keeps the cells alive
12.

Acid is?

a)

A substance that reacts to metals and carbonates, and has a Ph of below 7.

b)

Often used in drain cleaner.

c)

Something that can only be found in a lab

d)

A bitter tasting substance

13.

A base is

a)

A substance that feels slippery, has a higher Ph than 7, and is often used in drain cleaner.

b)

Has a Ph of below 7 and can react to metal and carbonates

c)

Is only found in a lab

d)

Something water can never be

14.

An indicator is?

a)

A lab manual or guide

b)

Something like litmus paper that can tell you if a substance is acidic or basic

c)

A PS4 game where you pretend to direct traffic

d)

Something only scientists in a lab can use

15.

Acid can prevent bacteria from growing

a)

True

b)

False

16.

You can neutralize acid by adding a base that is just as strong?

a)

Ture

b)

False

17.

When you neutralize acid with a base you create

a)

a Salt and water

b)

You can not neutralize acid with a base

c)

You create carbon dioxide

d)

A moderate sized explosion

18.

A substance with a ph of higher that 7.5 is a?

a)

Home dog doggity

b)

Base

c)

Acid

d)

Salt

19.

A substance with a ph of lower than 7 is a

a)

Acid

b)

True OG

c)

Base

d)

Salt

20.

True or false: a neutral solution has equal amounts of H+ and OH-.

a)

True

b)

False

21.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

22.

HCl is found in household products, including some toilet bowl cleaners. Is HCl an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

23.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

24.
hydrochloric acid
a)
HCl
b)
HClO
c)
H3ClO3
d)
HClO3
25.

sulfuric acid

a)

HSO3

b)

H2SO3

c)

H2SO4

d)

H3SO4

26.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
27.

A substance is found to have the following characteristics:


Very bitter taste

Feels soapy to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

28.

Basic oxide

a)

BaO

b)

P2O5

c)

ZnO

d)

CO2

29.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
30.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
31.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
32.

Which is NOT an amphoteric oxide?

a)

zinc oxide

b)

aluminium oxide

c)

lead (II) oxid

d)

sodium oxide

33.

Which is NOT an amphoteric oxide?

a)

zinc oxide

b)

aluminium oxide

c)

lead (II) oxid

d)

sodium oxide

34.

Which of the followings is an acidic oxide?

a)

SO2

b)

H2O

c)

CO

d)

ZnO

35.

Acids are substances that release H+ ions when dissolved in water.

a)

True

b)

False

36.

Alkalis are substances that produce OH- ion when dissolved in water.

a)

True

b)

False

37.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

38.

Which of the following values would represent the pH of a strong base?

a)

1

b)

8

c)

7

d)

13

39.

What range of values on the pH scale represent solutions with a higher ratio of hydronium (H3O+) ions?

a)

0-14

b)

below 7

c)

7

d)

above 7

40.
an aqueous soln turns red lithmus blue . excess addition of which of the following would reverse the change
a)
baking powder
b)
lime
c)
ammonium hydroxide solution
d)
HCL
41.
a sample of soil is mixed with water and allow to settle . The soln turns yellowish orange which of the foll soln will turn the colour to greenish blue 
a)
lemon juice
b)
vinegar
c)
common salt
d)
antacid
42.
If a few drops of concentrated acid accidentally spills over the hand of a student,what should be done
a)
wash the hand with saline solution
b)
wash the hand immediately with plenty of water and apply a soln of sodium hydrogen carbonate
c)
after washing apply soln of sodium hydroxide
d)
neutralise the acid wih a strong alkali
43.
sodium hydrogen carbonate when added to acetic acid evolves  a gas .which of the statement is true about the gas evolved
a)
it turns lime water milky
b)
it burns with a pop sound
c)
it changes the soln colorless
d)
it has a pungent smell
44.
common salt besides being used in kitchen can also be used as the raw material for making
a)
washing soda
b)
calcium salts
c)
plaster of paris
d)
slaked lime
45.
which of the foll phenomena occur when a small amunt of acid is added to water
a)
ionisation
b)
neutralisation
c)
dilution
d)
formation
46.
which one of the foll can be used as acid-base indicator by  visually impared student 
a)
litmus
b)
turmeric
c)
vanilla essence
d)
petunia leaves
47.
which of the foll substances will not give carbon dioxide on treatment with dilute acid
a)
marble
b)
limestone
c)
baking soda
d)
lime
48.
which of the  foll is acidic in nature
a)
limewater
b)
humanblood
c)
lime juice
d)
antacid
49.
which of the foll is not a base
a)
NAOH
b)
KOH
c)
NH4OH
d)
C2H5OH
50.

How would you best describe your Chemistry class this year?

a)

awesome

b)

very strange

c)

dull

51.
Most foods are 
a)
Acid
b)
Basic
c)
Neutral
d)
salts
52.
Why does vinegar help preserve things like pickles? 
a)
It keeps moisture in. 
b)
It preserves flavors and crispness
c)
It kills bacteria that break down foods. 
d)
It keeps the cells alive
53.
An extremely strong acid would have a pH of...
a)
1
b)
7
c)
9
d)
14
54.
An extremely strong base would have a pH of...
a)
1
b)
7
c)
9
d)
14
55.
A neutral substance would have pH of...
a)
8
b)
7
c)
6
d)
14
56.
If a solution is neither acidic or basic it has a pH of _____________.
a)
1
b)
13
c)
6
d)
7
57.
Indicators change color in the presence of a(n) _______________.
a)
acid or base
b)
buffer
c)
water molecule
d)
ester
58.
A base has a ___________ taste.
a)
bland
b)
salty
c)
bitter
d)
sour
59.
A base has a _________________.
a)
sour taste
b)
positive ion
c)
slippery feel
d)
pH of 5
60.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
61.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
62.
what happens when a solution of  an acid is mixed with a solution of a base in a test tube?a
a)
temperature of the solution increases 
b)
temperature of the solution decreases
c)
temperature remains constant
d)
no reaction
63.
an aqueous soln turns red lithmus blue . excess addition of which of the following would reverse the change
a)
baking powder
b)
lime
c)
ammonium hydroxide solution
d)
HCL
64.
during preparation of HCL gas on a humid day the gas is usually passed through the guardtube containing calcium chloride .The role of calcium chloride is 
a)
absorb the evolved gas
b)
moisten the gas
c)
absorb moisture from the gas
d)
absorb CL ions from the evolved gas
65.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
66.
a sample of soil is mixed with water and allow to settle . The soln turns yellowish orange which of the foll soln will turn the colour to greenish blue 
a)
lemon juice
b)
vinegar
c)
common salt
d)
antacid
67.
If a few drops of concentrated acid accidentally spills over the hand of a student,what should be done
a)
wash the hand with saline solution
b)
wash the hand immediately with plenty of water and apply a soln of sodium hydrogen carbonate
c)
after washing apply soln of sodium hydroxide
d)
neutralise the acid wih a strong alkali
68.
sodium hydrogen carbonate when added to acetic acid evolves  a gas .which of the statement is true about the gas evolved
a)
it turns lime water milky
b)
it burns with a pop sound
c)
it changes the soln colorless
d)
it has a pungent smell
69.
common salt besides being used in kitchen can also be used as the raw material for making
a)
washing soda
b)
calcium salts
c)
plaster of paris
d)
slaked lime
70.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive
71.
which of the foll phenomena occur when a small amunt of acid is added to water
a)
ionisation
b)
neutralisation
c)
dilution
d)
formation
72.
which one of the foll can be used as acid-base indicator by  visually impared student 
a)
litmus
b)
turmeric
c)
vanilla essence
d)
petunia leaves
73.
which of the foll substances will not give carbon dioxide on treatment with dilute acid
a)
marble
b)
limestone
c)
baking soda
d)
lime
74.
which of the  foll is acidic in nature
a)
limewater
b)
humanblood
c)
lime juice
d)
antacid
75.
which of the foll is not a base
a)
NAOH
b)
KOH
c)
NH4OH
d)
C2H5OH
76.
Which of the foll statement is not correct and CO2
a)
all metal carbonates react with acid to give a salt,water and CO2
b)
all metal oxides react with water to give salt and acid
c)
some metals react with acids to give salt and H2
d)
some non metal oxides react with water to form an acid
77.

Complete the definition below:

Acids are....

a)

hydrogen donors.

b)

hydrogen acceptors.

c)

proton donors.

d)

proton acceptors.

78.

A substance has a pH value of 8. It is most likely to be what?

a)

Strong acid

b)

Weak acid

c)

Strong base

d)

Weak base

79.

Which indicator is colourless in acid and pink in alkali?

a)

Litmus

b)

Phenolphthalein

c)

Universal Indicator

d)

Methyl Orange

80.

Which is the correct sequence of steps to make a pure sample of a soluble salt?

a)

Add excess acid to base, filter acid, evaporate half of solution, leave to crystallise, remove crystals and dry them with filter paper.

b)

Mix two soluble solutions and filter off the insoluble salt. Dry the salt.

c)

Add excess base to acid, filter excess base, evaporate half of solution, leave to crystallise, remove crystals and dry them with filter paper.

d)

Add UI to acid and add base until UI turns green. Evaporate half of solution, leave to crystallise, remove crystals and dry them with filter paper.

81.

Complete this equation:

sulfuric acid + potassium hydroxide -->

a)

potassium oxide + hydrogen

b)

potassium chloride + water

c)

potassium sulfate + hydrogen

d)

potassium sulfate + water

82.

What acid is needed to make copper nitrate?

a)

Hydrochloric

b)

Nitric

c)

Sulfuric

d)

Phosphoric

83.

Which equation is balanced?

a)

H2SO4 + NaOH --> Na2SO4 + H2

b)

H2SO4 + 2NaOH --> Na2SO4 + H2

c)

H2SO4 + 2NaOH --> Na2SO4 + H2O

d)

H2SO4 + 2NaOH --> Na2SO4 + 2H2O

84.

What s made when a proton reacts with a hydroxide ion?

a)

Water

b)

An acid

c)

An alkali

d)

A salt

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