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acid bases and salt 10th

Total questions: 100

Worksheet time: 5hrs 32mins

Name
Class
Date
1.
Bases
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
2.
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
3.
Which of the following is a salt: ammonia or sodium chloride?
a)
ammonia 
b)
sodium chloride
4.
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
5.
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
6.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
7.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
8.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
9.
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
10.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
11.
Which of the following is a positive for  an acid
a)
Blue Litmus paper staying blue
b)
Red Litmus paper staying red
c)
Phenolphthalein being purple
d)
Bromothymol blue turning blue
12.
What is the name of the following acid: HCl
a)
hydrochloric acid
b)
chloric acid
c)
perchloric acid
d)
chlorous acid
13.
What is the name of the following acid: H2SO4
a)
hydrosulfuric acid
b)
sulfuric acid
c)
sulfurous acid
d)
persulfuric acid
14.
products of a neutralisation reaction are always
a)
an acid and a base
b)
an acid and a salt
c)
salt and water
d)
salt and base
15.
products of a neutralisation reaction are always
a)
an acid and a base
b)
an acid and a salt
c)
salt and water
d)
salt and base
16.

... are used to neutralise acid in the stomach.

a)

Toothpastes

b)

Bacterias

c)

Antacids

d)

More strong acids

17.

which of the following salts does not contain water of crystallisation?

a)

Blue vitriol

b)

Baking soda

c)

Washing soda

d)

Gypsum

18.

Plaster of Paris is obtained by heating:

a)

Gypsum

b)

Limestone

c)

Sodium chloride

d)

Acetic acid

19.

Metal hydrogen carbonates react with acids to give

a)

salt ,water , chlorine

b)

salt , water and carbon di oxide

c)

salt and carbon di oxide

d)

salt , hydrogen and carbon dioxide

20.

which of the following is used for dissolution of gold?

a)

Hydrochloric acid

b)

Sulphuric acid

c)

Nitric acid

d)

Aqua regia

21.

The pH of the gastric juices released during digestion is -

a)

less than 7

b)

more than 7

c)

equal to 7

d)

equal to 0

22.
A base has a ___________ taste.
a)
bland
b)
salty
c)
bitter
d)
sour
23.

metal oxides are generally

a)

acidic in nature

b)

basic in nature

c)

neutral

d)

some may be acidic some may be basic

24.

HCl is aciidic in

a)

in gaseous state

b)

in benzene solution

c)

in aqueous solution

d)

in any of these

25.

in aqueous solution, H+ ions exist as

a)

H30+

b)

H9O4+

c)

Neither of these

d)

either H30+ or H9O4+

26.

which of the acids are called king of chemicals

a)

H Cl

b)

H2so4

c)

HNo3

d)

vinegar(acetic acid)

27.

Litmus solution is purple colured dye extracted from (a)   plant

28.

phenophthalein has __________ colur in basic solution.

a)

red

b)

pink

c)

yellow

d)

green

29.
What property do all three of these common household substances have in common?
a)
they are all basic
b)
they taste sour
c)
they have a pH below 7
d)
they all turn litmus paper red
30.
If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH? 
a)
add more acid
b)
add more water
c)
increase the temperature
d)
add a base
31.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
32.
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
33.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
34.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
35.
On the pH scale what numbers are bases?
a)
8-14
b)
0-7
c)
7
d)
1
36.

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

a)

oxide

b)

oxygen

c)

hydronium

d)

hydroxide

37.

What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?

a)

1

b)

7

c)

10

d)

4

38.
Salts
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
39.
Which of the following is a salt: ammonia or sodium chloride?
a)
ammonia 
b)
sodium chloride
40.
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. 
41.
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
42.
Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is.  Which of these pH values would be a strong acid?
a)
2
b)
6
c)
9
d)
13
43.

tick the natural indicators

a)

turmeric

b)

phenophthalien

c)

iodine solution

d)

methylene blue

44.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
45.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
46.
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
47.

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

a)

Neutralization

b)

Combustion

c)

Oxdation

d)

Decomposition

48.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
49.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
50.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
51.
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
52.
Most foods are 
a)
Acid
b)
Basic
c)
Neutral
d)
salts
53.
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
54.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
55.
is this object acidic or base
a)
Acidic
b)
Base
c)
neither
d)
neutral 
56.
What was red cabbage juice used as in the lab we performed?
a)
as an acid
b)
as a base
c)
as a colorant
d)
as an indicator
57.

Which of the following is a Mineral Acid?

a)

Citric Acid

b)

Oxalic Acid

c)

Glycolic Acid

d)

Sulphuric Acid

58.

Fruits such as oranges , lemon etc, contain ........................... Acid

a)

Citric

b)

Lactic

c)

Ascorbic

d)

Acetic

59.

Which one of the following is not a neutral substance ?

a)

Glucose

b)

Sodium Hydroxide

c)

Urea

d)

Sugar

60.

Bases turn Red litmus to ...................

a)

Green

b)

Yellow

c)

Blue

d)

Black

61.

If the given solution neither changes the colour of the red litmus nor blue litmus paper , it is ..........................

a)

An Acid

b)

A base

c)

Neutral

d)

Colourless

62.

Hydrochloric Acid solution affect .......................... litmus paper

a)

Red

b)

Blue

c)

Both of these

d)

None of these

63.

Bases turn yellow turmeric paper to ...........................

a)

Green

b)

Red

c)

Pink

d)

Orange

64.

Methyl Orange is a

a)

Natural

b)

Human-Made

c)

Pink

d)

Colourless

65.

Which method is recommended to dilute an acid

a)

An acid is added to water

b)

Water added to acid

66.

The Substance which turns Blue litmus red is ......................

a)

Basic

b)

Acidic

c)

Neutral

d)

All of these

67.

Milk of magnesia contains .............................

a)

Sodium

b)

Potassium

c)

Magnesium

d)

Ammonium

68.

Manure is added , when the soil is too ...................................

a)

Acidic

b)

Basic

c)

Neutral

d)

None of these

69.
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
70.
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
71.
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
72.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
73.
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
74.
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
75.
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
76.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive
77.
which of the foll phenomena occur when a small amunt of acid is added to water
a)
ionisation
b)
neutralisation
c)
dilution
d)
formation
78.
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
79.
which of the foll substances will not give carbon dioxide on treatment with dilute acid
a)
marble
b)
limestone
c)
baking soda
d)
lime
80.
which of the  foll is not mineral acid
a)
HCL
b)
H2SO4
c)
HNO3
d)
citric acid
81.
which of the foll is not a base
a)
NAOH
b)
KOH
c)
NH4OH
d)
C2H5OH
82.
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
83.
which of the foll are present in dil aqueous soln of HCL 
a)
H3O+ +CL-
b)
H30+ +OH-
c)
CL+ +OH-
d)
UNIONISED HCL
84.

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

a)

True

b)

False

85.

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)

86.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

87.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
88.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
89.

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

90.

Basic oxide

a)

BaO

b)

P2O5

c)

ZnO

d)

CO2

91.
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.
92.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
93.
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.
94.

Which is NOT an amphoteric oxide?

a)

zinc oxide

b)

aluminium oxide

c)

lead (II) oxid

d)

sodium oxide

95.

Which of the followings is an acidic oxide?

a)

SO2

b)

H2O

c)

CO

d)

ZnO

96.

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

a)

True

b)

False

97.

Which oxide is able to react with HNO3?

a)

MgO

b)

CO2

c)

NO2

d)

CO

98.

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

a)

True

b)

False

99.

Sulfuric acid reacts with sodium hydroxide to form salt X and water. Name the salt.

a)

sodium sulfate

b)

sodium nitrate

c)

sodium chloride

100.

Potassium carbonate reacts with an acid Y to form potassium nitrate, water and carbon dioxide. What is the acid used for this reaction?

a)

HNO3

b)

H2SO4

c)

HCl

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