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ACID BASE AND SALTS

Total questions: 136

Worksheet time: 3hrs 44mins

Name
Class
Date
1.

1. Which of the following acid is present in sour milk?

a)

Lactic acid

b)

tartaric acid

c)

glycolic acid

d)

citrus acid

2.

When CO2 is passed through lime water, it turns milky. the milkiness in due to formation of

a)

H2 O

b)

CaCO3

c)

CaO

d)

CO2

3.

Incorrect statement about acids is/are

a)

they have bitter taste

b)

they changes the colour or red litmus to blue

c)

they changes the colour or blue litmus to red

d)

all above

4.

When aqueous sodium carbonate (Na2CO3) with HCl(aq), it gives

a)

(a) NaOH, H2 (g) and CO2(g)

b)

(b) NaCl, H2 O and CO2(g)

c)

(c) NaHCO3, H2 (g) and CO2(g)

d)

(d) NaHCO3, H2 O and CO2(g)

5.

Chemical formula of baking soda is-

a)

NaHCO3

b)

NaCO3

c)

MgSO4

d)

MgCO3

6.

Antacids contain

a)

weak base

b)

Strong base

c)

Strong acid

d)

weak acid

7.

Bleaching powder is soluble in cold water giving a milky solution due to-

a)

(a) available chlorine

b)

(b) lime present in it

c)

(c) calcium carbonate formation

d)

(d) The absorption of carbon dioxide from atmosphere

8.

Plaster of Paris hardens by-

a)

(a) giving of CO2

b)

(b) changing into CaCO3

c)

(c) combining with water

d)

(d) giving out water

9.

If Copper sulphate pentahydrate is heated then,

a)

crystal shape chnages

b)

It becomes white

c)

it becomes blue

d)

none

10.

1. Three acidic solutions A, B and C have pH = 0, 3 and 5 respectively. Which solution has the highest concentration of H+ ions?

a)

A

b)

B

c)

C

d)

don't know

11.

Dry HCl gas dhanges the colour of dry blue litmus

a)

dry blue litmus

b)

dry red litmus

c)

both

d)

none

12.

NH3 + H2O + CO2 + NaCl gives

a)

NaHCO3 + NH4Cl

b)

NaHCO3

c)

NH4Cl

d)

NaHCO3 + NH4Cl+ H2O

13.

NaHCO3 on heating gives

a)

Na2CO3 + CO2 + H2O

b)

Na2CO3 + CO2

c)

Na2CO3 + H2O

d)

Na2CO3

14.

Sodium hydrogen carbonate is used in fire extinguisher.

a)

True

b)

false

15.

Plaster of Paris is obtained by heating gypsum at 3730C

a)

True

b)

False

16.

When NaOH and HCl are mixed in equal molar quantities, the result is

a)

(a) the formation of salt +H2O

b)

(b) the formation of salt +H2(g)

c)

(c) the formation of salt +O2(g)

d)

(d) All above are correct

17.

A student detected the pH of four unknown solutions A, B, C and D as follows: 11, 5, 7 and 2. Predict the nature of these solutions. Which one is neutral solution

a)

A

b)

B

c)

C

d)

D

18.

Plaster of pairs is made from-

a)

(a) lime stone

b)

(b) slaked lime

c)

(c) quick lime

d)

(d) gypsum

19.

Bleaching powder gives smell of chlorine because it-

a)

(a) is unstable

b)

(b) gives chlorine on exposure to atmosphere

c)

(c) is a mixture of chlorine and slaked lime

d)

(d) contains excess of chlorine

20.

The reaction of metal with acid results in the formation of-

a)

(a) only hydrogen gas

b)

(b) only salt

c)

(c) both salt and hydrogen gas

d)

(d) none of these

21.

Tomato is a natural source of which acid?

a)

(a) Acetic acid

b)

(b) Citric acid

c)

(c) Tartaric acid

d)

(d) Oxalic acid

22.

Alkalis are

a)

(a) acids, which are soluble in water

b)

(b) acids, which are insoluble in water

c)

(c) bases, which are insoluble in water

d)

(d) bases, which are soluble in water

23.

Sodium hydroxide is a

a)

Weak acid

b)

Weak base

c)

Strong acid

d)

Strong base

24.

Sodium hydroxide is used

a)

(a) as an antacid

b)

(b) in manufacture of soap

c)

(c) as a cleansing agent

d)

(d) in alkaline batteries

25.

Sodium hydroxide turns phenolphthalein solution

a)

(a) pink

b)

(b) yellow

c)

(c) colourless

d)

(d) orange

26.

Chemical formula of sulphuric acid

a)

Hcl

b)

HNo3

c)

H2SO4

d)

NONE OF THE ABOVE

27.

Acids turn …………. litmus solution…………. .

(a)  

28.

Among HCl, H2SO4 and CH3COOH, …………. is a weak acid.

(a)  

29.

Acid taste

(a)  

30.

One example for olfactory indicators..

(a)  

31.

Which of the following is an antacid?

a)

Mg(OH)2

b)

NaOH

c)

H2SO

d)

H2O

32.

Which among the following is not a base?

a)

NaOH

b)

KOH

c)

HCl

d)

NH4OH

33.

Ants string is an example of

a)

Ascorbic acid

b)

Formic acid

c)

Lactic acid

d)

Calcium hydroxide

34.

Bases Turn Red Litmus

a)

Blue

b)

Green

c)

Yellow

d)

Red

35.

The Reaction Between an Acid and a Base is

a)

Neutralisation

b)

Acid

c)

Bases

36.

Which of the following substance is Neutral in Nature?

a)

Hydrochloric Acid

b)

Glucose

c)

Sodium Hydroxide

d)

Calcium Carbonate

37.

Which of the following base absorbs Carbon dioxide (CO2)

a)

Mg(OH)2

b)

CuSO4

c)

KOH

d)

NaoH

38.

Chemicals formed when an acid and a base combine.

a)

salts

b)

noble gases

c)

metalloids

d)

hydroxides

39.

Which of the following cannot be used as an indicator?

a)

Turmeric

b)

Onion

c)

Sugar

d)

Beetroot

40.

Methyl orange turn acid _____ and turn base into______ colour

a)

red , yellow

b)

red , blue

41.

Q10) Which of the following salts does not contain water of crystallization?

a)

(A) Blue vitriol

b)

(B) Baking soda

c)

(C) Washing soda

d)

(D) Gypsum

42.

Q9) CuSO4 .5H2O In this Compound the water molecule is called -

a)

(A) Pure Water

b)

(B) Water of Crystallisation

c)

(C) Soda Water

d)

(D) None of these

43.

Q8) Which of the following are present in a dilute Aqueous solution of Hydrochloric Acid?

a)

(A) H3O + Cl-

b)

(B) H3O + OH-

c)

(C) Cl- + OH-

d)

(D) Unionised HCl

44.

Q7) Farmers neutralize the effect of Acidity on soil by adding

a)

(A) Slaked Lime

b)

(B) Gypsum

c)

(C) Caustic Soda

d)

(D) Baking Soda

45.

Q6) Lactic Acid is present in-

a)

(A) Orange

b)

(B) Tea

c)

(C) Curd

d)

(D) Vinegar

46.

Q6) Lactic Acid is present in-

a)

(A) Orange

b)

(B) Tea

c)

(C) Curd

d)

(D) Vinegar

47.

Q5) Which salt is Neutral salt?

a)

(A) NH4Cl

b)

(B) CH3COONH4

c)

(C) CH3COONa

d)

(D)Na2CO3

48.

Q4) pH value less than 7 indicates that the solution is –

a)

(A) Acidic

b)

(B) Basic

c)

(C) Neutral

d)

(D) No effect

49.

Q3) Na2CO3 .10H2O is known as-

a)

(A) Baking Soda

b)

(B) Baking Powder

c)

(C) Washing Soda

d)

(D) Bleaching Powde

50.

Q2) Which Acid is a strong Acid in the following:

a)

(A) HCl pH 1

b)

(B) CH3COOH pH 5

c)

(C) Lemon juice pH 2.2

d)

(D) Pure Milk pH 6

51.

Q1) Which Acid is present in Tomato ?

a)

(A) Citric Acid

b)

(B) Oxalic Acid

c)

(C) Lactic Acid

d)

(D) HCl

52.
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
53.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
54.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
55.
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
56.

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

a)

Neutralization

b)

Combustion

c)

Oxdation

d)

Decomposition

57.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
58.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
59.
Feels slippery.
a)
Acids
b)
Bases
c)
All
60.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
61.
is this object acidic or base
a)
Acidic
b)
Base
c)
neither
d)
neutral 
62.

Which pH level indicates a strong alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

63.
Salt water did not react with the Red or Blue litmus paper.  This must mean
a)
Salt water is a Base
b)
Salt water is an Acid
c)
Salt water is neutral
d)
Salt water is charged
64.

Which of the following are the characteristics of a BASE?

a)

Very bitter in taste

b)

Liberate OH- ions when dissolved in water

c)

Have pH of less than 7

d)

Turns blue litmus red

65.

Which among the following is not a base?

a)

NaOH

b)

KOH

c)

HCl

d)

NH4OH

66.
All solutions that fall between 0 and 6.9 are
a)
Acids
b)
Bases
c)
Neutral
d)
Phytoplankton
67.

Which of these turn red litmus paper blue?

a)

acids

b)

bases

c)

salts

68.

The pH scale is used to determine the strength of

a)

acids and bases

b)

chemical bonds

c)

electrical charges

d)

particles in a solution

69.

Anything with a pH of 7 is a(n)

a)

neutral substance

b)

acid

c)

base

d)

chemical salt

70.

How would you best describe your science class this year?

a)

awesome

b)

very strange

c)

dull

71.
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
72.

Acids taste

a)

sour

b)

sweet

c)

bitter

d)

salty

73.

Bases taste

a)

sweet

b)

sour

c)

bitter

d)

salty

74.

Which of the following feel soapy on touching?

a)

Acid

b)

Base

c)

Salt

d)

None of these

75.

Which of the following is a natural indicator?

a)

China rose petal

b)

Turmeric

c)

Litmus

d)

All of these

76.

Which of the following is basic in nature?

a)

Lime water

b)

Baking soda

c)

Both (a) and (b)

d)

Lemon juice

77.

Litmus is extracted from

a)

curd

b)

grapes

c)

lichens

d)

cabbage

78.

When a drop of vinegar solution is put on the blue litmus paper, it turns

a)

red

b)

purple

c)

yellow

d)

orange

79.

When we suffer from acidity, we should take

a)

iron tonic

b)

vitamins

c)

antacid

d)

lactocalamine

80.

Calcium hydroxide is found in

a)

window cleaner

b)

lime water

c)

soap

d)

lime juice

81.

Neutralisation reaction is a

a)

physical and reversible change

b)

physical and irreversible change

c)

chemical and reversible change

d)

chemical and irreversible change

82.

What happens when a solution of an acid is mixed with a solution of a base in a test tube?

(i) Temperature of the solution decreases

(ii) Temperature of the solution increases

(in) Temperature of the solution remains the same

(iv) Salt formation takes place

a)

(i) and (iv)

b)

(i) and (iii)

c)

(ii) only

d)

(ii) and (iv)

83.

When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

a)

absorb the evolved gas

b)

moisten the gas

c)

absorb moisture from the gas

d)

absorb Cl– ions from the evolved gas

84.

Which one of the following salts do not contain water of crystallisation?

a)

Blue vitriol

b)

Baking soda

c)

Washing soda

d)

Gypsum

85.

In terms of acidic strength, which one of the following is in the correct increasing order?

a)

Water < Acetic acid < Hydrochloric acid

b)

Water < Hydrochloric acid < Acetic acid

c)

Acetic acid < Water < Hydrochloric acid

d)

Hydrochloric acid < Water < Acetic acid

86.

Tomato is a natural source of which acid?

a)

Acetic acid

b)

Citric acid

c)

Tartaric acid

d)

Oxalic acid

87.

What is formed when zinc reacts with sodium hydroxide?

a)

Zinc hydroxide and sodium

b)

Sodium zincate and hydrogen gas

c)

Sodium zinc-oxide and hydrogen gas

d)

Sodium zincate and water

88.

Brine is an

a)

an aqueous solution of sodium hydroxide

b)

an aqueous solution of sodium carbonate

c)

an aqueous solution of sodium chloride

d)

an aqueous solution of sodium bicarbonate

89.

Na2CO3. 10H2O is

a)

washing soda

b)

baking soda

c)

bleaching powder

d)

tartaric acid

90.

At what temperature is gypsum heated to form Plaster of Paris?

a)

90°C

b)

100°C

c)

110°C

d)

120°C

91.

How many water molecules does hydrated cal-cium sulphate contain?

a)

5

b)

10

c)

7

d)

2

92.

Sodium carbonate is a basic salt because it is a salt of a

a)

strong acid and strong base

b)

weak acid and weak base

c)

strong acid and weak base

d)

weak acid and strong base

93.

Alkalis are

a)

acids, which are soluble in water

b)

acids, which are insoluble in water

c)

bases, which are insoluble in water

d)

bases, which are soluble in water

94.

Which of the following statements is correct about an aqueous solution of an acid and of a base?

(i) Higher the pH, stronger the acid

(ii) Higher the pH, weaker the acid

(in) Lower the pH, stronger the base

(iv) Lower the pH, weaker the base

a)

(i) and (iii)

b)

(ii) and (iii)

c)

(i) and (iv)

d)

(ii) and (iv)

95.

The apparatus given in the adjoining figure was set up to demonstrate electrical conductivity.

Which of the following statement(s) is (are) correct?

(i) Bulb will not glow because electrolyte is not acidic.

(ii) Bulb will glow because HCl is a strong acid and furnishes ions for conduction.

(iii) Bulb will not glow because the circuit is incomplete.

(iv) Bulb will not glow because it depends upon the type of electrolytic solution.

a)

(i) and (iii)

b)

(ii) and (iv)

c)

(ii) only

d)

(iv) only

96.

Lime water reacts with chlorine to give

a)

bleaching powder

b)

baking powder

c)

baking soda

d)

washing soda

97.

Tooth enamel is made up of

a)

calcium phosphate

b)

calcium carbonate

c)

calcium oxide

d)

potassium

98.

What is the pH range of our body?

a)

7.0 – 7.8

b)

7.2 – 8.0

c)

7.0 – 8.4

d)

7.2 – 8.4

99.

Rain is called acid rain when it:

a)

pH falls below 7

b)

pH falls below 6

c)

pH falls below 5.6

d)

pH is above 7

100.

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

a)

Baking powder

b)

Lime

c)

Ammonium hydroxide solution

d)

Hydrochloric acid

101.

When copper oxide and dilute hydrochloric acid react, colour changes to

a)

white

b)

bluish-green

c)

blue-black

d)

black

102.

Sodium hydroxide is used

a)

as an antacid

b)

in the manufacture of soap

c)

as a cleansing agent

d)

in alkaline batteries

103.

Sodium hydroxide turns phenolphthalein solution

a)

pink

b)

yellow

c)

colourless

d)

orange

104.

The chemical formula of washing soda is

a)

Na2C03 . 7H2O

b)

Na2C03 . 5H2O

c)

Na2C03 . 2H2O

d)

Na2C03 . 10H2O

105.

Nettle sting is a natural source of which acid?

a)

MetiWanoic acid

b)

Lactic acid

c)

Citric acid

d)

Tartaric acid

106.

Sodium hydroxide is a

a)

weak base

b)

weak acid

c)

strong base

d)

strong acid

107.

How many level are there in pH scale ?

a)

1

b)

7

c)

11

d)

14

108.

What happens to litmus paper in acidic solutions?

a)

Red litmus turns blue

b)

Blue litmus turns red

c)

Yellow litmus turns green

109.

Universal indicator solution is usually green to begin with. What does this mean?

a)

It is acidic

b)

It is alkaline

c)

It is neutral

110.

A liquid has a pH of 8. What does this mean?

a)

it is neutral

b)

It is weakly acidic

c)

it is weakly akline

111.

A liquid has a pH of 1. What does this mean?

a)

It must be sodium hydroxide solution

b)

It is strongly acidic

c)

It is weakly akline

112.

Which acid could be used to make ammonium nitrate (a type of fertiliser)?

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Nitric acid

113.

Which salt is made when copper oxide and sulfuric acid react together?

a)

Copper sulfate

b)

Copper sulfuroxide

c)

Copper sulfide

114.

What is the result of neutralisation reaction

a)

salt, water

b)

alkaline, acid

c)

salt, alkaline

115.

Our stomach contain ____________ to help us digest food

a)

strong alkaline

b)

salspecial salt and water

c)

strong acid

116.

pH of soap is 8, soap is ________

a)

strongly acidic

b)

neutral

c)

weakly alkaline

117.
An extremely strong acid would have a pH of...
a)
1
b)
7
c)
9
d)
14
118.
An extremely strong base would have a pH of...
a)
1
b)
7
c)
9
d)
14
119.
A neutral substance would have pH of...
a)
8
b)
7
c)
6
d)
14
120.
If a solution is neither acidic or basic it has a pH of _____________.
a)
1
b)
13
c)
6
d)
7
121.
Indicators change color in the presence of a(n) _______________.
a)
acid or base
b)
buffer
c)
water molecule
d)
ester
122.
A base has a ___________ taste.
a)
bland
b)
salty
c)
bitter
d)
sour
123.

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

124.

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

125.

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

126.

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

127.

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

128.

Which of these taste sour?

a)

acids

b)

bases

c)

salts

129.

Which of these feel slippery?

a)

bases

b)

acids

c)

salts

130.

Which of these turn red litmus paper blue?

a)

acids

b)

bases

c)

salts

131.

The pH scale is used to determine the strength of

a)

acids and bases

b)

chemical bonds

c)

electrical charges

d)

particles in a solution

132.

Chemicals formed when an acid and a base combine.

a)

salts

b)

noble gases

c)

metalloids

d)

hydroxides

133.

How would you best describe your science class this year?

a)

awesome

b)

very strange

c)

dull

134.
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
135.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
136.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive

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