Multiple Choice Questions
Acids, Bases and Salts
Practice Questions with Answers
Total 129 questions available
Q. 1
Which of the following is used for dissolution of
gold?
A
Nitric acidB
Hydrochloric acidC
Aqua regiaD
Sulphuric acidClick an option to check your answer
Q. 2
Nature of the aqueous solution of common salt is:
A
AcidicB
AlkalineC
BasicD
NeutralClick an option to check your answer
Q. 3
The pH range most conducive for life of fresh
water plants and animals is :
A
3.5-5.0B
9.0-10.5C
6.5-7.5D
2.0-3.5Click an option to check your answer
Q. 4
Acid present in apple is :
A
Oxalic acidB
Malic acidC
Acetic acidD
Formic acidClick an option to check your answer
Q. 5
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 gasB
moisten the gasC
absorb moisture from the gas.D
absorb Clions from the evolved gasClick an option to check your answer
Q. 6
The H + ion concentration of a solution is 1.0×10-5m. The solution is
A
NeutralB
AcidicC
AmphotericD
AlkalineClick an option to check your answer
Q. 7
Which of the following gives the correct increasing order of acidic strength ?
A
Hydrochloric acid < Water < Acetic acidB
Water < Acetic acid < Hydrochloric acidC
Water < Hydrochloric acid < Acetic acidD
Acetic acid < Water < Hydrochloric acidClick an option to check your answer
Q. 8
If pH of solution is 13, it means that if is
A
Weakly basicB
Strongly BasicC
Strongly acidicD
Weakly acidicClick an option to check your answer
Q. 9
Rain is called acid rain when its:
A
pH falls below 5.6B
pH is above 7C
pH falls below 6D
pH falls below 7Click an option to check your answer
Q. 10
What is the nature of the solution formed by dissolving D in water?
A
AcidicB
AlkalineC
NeutralD
InsolubleClick an option to check your answer
Q. 11
Which one of the following is acidic in nature?
A
Sodium hydroxide solutionB
Gastric juiceC
Blood plasmaD
Lime waterClick an option to check your answer
Q. 12
Brine is an
A
aqueous solution of sodium carbonateB
aqueous solution of sodium hydroxideC
aqueous solution of sodium bicarbonateD
aqueous solution of sodium chlorideClick an option to check your answer
Q. 13
A calcium compound reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Identify the compound and the gas evolved)
A
Calcium chloride, carbondioxideB
Calcium oxide, hydrogenC
Calcium carbonate, hydrogenD
Calcium Carbonate, Carbon dioxideClick an option to check your answer
Q. 14
Compound C of sodium forms a:
A
White powderB
Black powderC
Liquid solutionD
Gaseous compoundClick an option to check your answer
Q. 15
Acids react with metal carbonates to liberate ______ gas.
A
HydrogenB
Carbon monoxideC
Carbon dioxideD
WaterClick an option to check your answer
Q. 16
Acids react with bases to form salt and water. This reaction is known as:
A
DecompositionB
NeutralisationC
reductionD
CombinationClick an option to check your answer
Q. 17
Which of the following is not a mineral acid ?
A
Nitric acidB
Sulphuric acidC
Citric acidD
Hydrochloric acidClick an option to check your answer
Q. 18
Which of the following statements is true for acids ?
A
Sour and change blue litmus to red)B
Bitter and change blue litmus to red)C
Sour and change red litmus to blue.D
Bitter and change red litmus to blue.Click an option to check your answer
Q. 19
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
A
Hydrochloric acidB
Baking powderC
LimeD
Ammonium hydroxide solutionClick an option to check your answer
Q. 20
When copper oxide and dilute hydrochloric acid react, colour changes to
A
blackB
whiteC
blue-blackD
bluish-greenClick an option to check your answer
Q. 21
Lime water reacts with chlorine to give
A
bleaching powderB
baking powderC
baking sodaD
washing sodaClick an option to check your answer
Q. 22
Dilute acid does not produce carbon dioxide on being treated with:
A
LimestoneB
MarbleC
LimeD
Baking sodaClick an option to check your answer
Q. 23
When a bee stings, immediately a paste of lime is put on the sting. Why?
A
Bee sting contains an acid called formic acid) It gets neutralised with CaOB
Bee sting is acidic due to hydrochloric acid and this is neutralisedC
All of the above.D
Bee sting is made of a baseClick an option to check your answer
Q. 24
Acids react with bases to form salt and water. This reaction is known as:
A
NeutralisationB
CombinationC
reductionD
DecompositionClick an option to check your answer
Q. 25
Baking soda is a mixture of:
A
Sodium carbonate and acetic acidB
Sodium carbonate and tartaric acidC
Sodium hydrogen carbonate and tartaric acidD
Sodium hydrogen carbonate and acetic acidClick an option to check your answer
Q. 26
Which among the following is compound F?
A
CO2B
H2CO3C
NaOHD
H2OClick an option to check your answer
Q. 27
When dissolved in water, the hydrated salt forms:
A
Weak baseB
Strong acidC
Strong baseD
Weak acidClick an option to check your answer
Q. 28
A calcium compound reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Identify the compound and the gas evolve
A
Calcium oxide, hydrogenB
Calcium carbonate, hydrogenC
Calcium chloride, carbondioxideD
Calcium Carbonate, Carbon dioxideClick an option to check your answer
Q. 29
Bleaching powder is used as a disinfectant for water to:
A
Make water tastierB
Make water germ-freeC
Make water clearD
Remove all the dirt from waterClick an option to check your answer
Q. 30
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
A
LimeB
Baking powderC
Hydrochloric acidD
Ammonium hydroxide solutionClick an option to check your answer
Q. 31
Sodium hydroxide turns phenolphthalein solution
A
yellowB
colourlessC
pinkD
orangeClick an option to check your answer
Q. 32
Which one of the following types of medicines is used for treating indigestion?
A
AnalgesicB
AntacidC
AntisepticD
AntibioticsClick an option to check your answer
Q. 33
An indicator is one kind of the following compound
A
Weak base or acid onlyB
Strong acid onlyC
Complex saltD
Reducing agentClick an option to check your answer
Q. 34
Ammonium sulphate salt is
A
Complex saltB
Neutral saltC
Basic saltD
Acidic saltClick an option to check your answer
Q. 35
How is the strength of an alkali represented on the pH scale?
A
Decrease in pH valueB
Increase in pH valueC
pH value remains constantD
Inverse relation to pH valueClick an option to check your answer
Q. 36
How are pure crystals of NaCl separated from soluble impurities?
A
EvaporationB
DistillationC
CrystallizationD
SublimationClick an option to check your answer
Q. 37
If a few drops of a concentrated acid accidentally
spills over the hand of a student, what should be
done?
A
After washing with plenty of water apply solution of sodium hydroxide on the hand.B
Wash the hand with saline solutionC
Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate.D
Neutralise the acid with a strong alkali.Click an option to check your answer
Q. 38
Sodium carbonate is a basic salt because it is a salt of
A
weak acid and strong base.B
strong acid and weak base.C
weak acid and weak base.D
strong acid and strong base.Click an option to check your answer
Q. 39
Which one of the given is incorrect?
A
Aqueous solutions of acids conduct electricityB
None of theseC
Acids turns blue litmus paper redD
Acids react with certain metals to form hydrogen gasClick an option to check your answer
Q. 40
Which of the following compounds is alkaline in an aqueous medium?
A
CuSO4B
NaClC
Na2CO3D
H2CO3Click an option to check your answer
Q. 41
Which of the following salts do not contain water
of crystallisation?
A
GypsumB
Blue vitriolC
Washing sodaD
Baking sodaClick an option to check your answer
Q. 42
Sodium hydrogen carbonate when added to
acetic acid evolves a gas. Which of the following
statements are true about the gas evolved?
(i) It turns lime water milky.
(ii) It extinguishes a burning splinter.
(iii) It dissolves in a solution of sodium hydroxide.
(iv) It has a pungent odour.
(i) It turns lime water milky.
(ii) It extinguishes a burning splinter.
(iii) It dissolves in a solution of sodium hydroxide.
(iv) It has a pungent odour.
A
(i), (ii) and (iii)B
(i) and (ii)C
(ii), (iii) and (iv)D
(i) and (iv)Click an option to check your answer
Q. 43
A strong acid:
A
Partially gets ionized in waterB
Do not get ionized in waterC
Completely gets ionized in waterD
All the theseClick an option to check your answer
Q. 44
A drop of liquid sample was put on the pH paper, paper turned blue. The liquid sample must be of
A
Sodium bicarbonateB
Lemon JuiceC
Ethanoic aci(d)D
HClClick an option to check your answer
Q. 45
What does a higher hydronium ion concentration correspond to on the pH scale?
A
Neutral pHB
Higher pH valueC
pH value of 7D
Lower pH valueClick an option to check your answer
Q. 46
When you add a few drops of acetic acid to a test
tube containing sodium bicarbonate powder,
which one of the following is your observation ?
A
No reaction takes placeB
A colourless gas with pungent smell is released with brisk effervescenceC
Formation of bubbles of a colourless and odourless gas.D
A brown coloured gas is released with brisk effervescence.Click an option to check your answer
Q. 47
Methyl orange is
A
Pink in acidic medium, colourless in basic medium.B
Colourless in acidic medium, pink in basic mediumC
Pink in acidic medium, yellow in basic mediumD
Yellow in acidic medium, pink in basic mediumClick an option to check your answer
Q. 48
Which of the following is acidic in nature ?
A
Human bloodB
Lime waterC
AntacidD
Lime juiceClick an option to check your answer
Q. 49
Some fruits like mango, lemon, raw grapes, orange, et(c) , have a sour taste due to the presence of:
A
Acetic acidB
Oxalic acidC
Citric acidD
Lactic acidClick an option to check your answer
Q. 50
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
A
Wash the hand immediately with plenty of water and apply paste of sodium hydrogen carbonate.B
After washing with plenty of water, applies solution of sodium hydroxide on the hand)C
Neutralize the acid with a strong alkali.D
Wash the hand with saline solution.Click an option to check your answer
Q. 51
Acids react with metal carbonates to liberate ______ gas.
A
Carbon monoxideB
HydrogenC
Carbon dioxideD
WaterClick an option to check your answer
Q. 52
How are the impurities removed from the salt solution during crystallization?
A
DistillationB
FiltrationC
EvaporationD
CrystallizationClick an option to check your answer
Q. 53
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
A
Baking powderB
LimeC
Ammonium hydroxide solutionD
Hydrochloric acidClick an option to check your answer
Q. 54
Adding common salt to water will result in:
A
Flames in waterB
no change in pH of the waterC
decrease in pH of the waterD
increase in pH of the waterClick an option to check your answer
Q. 55
Which of the following salts does not contain water of crystallisation?
A
GypsumB
Washing sodaC
Baking sodaD
Blue vitriolClick an option to check your answer
Q. 56
Acids react with metals to liberate _________gas.
A
WaterB
HydrogenC
Carbon dioxideD
Carbon monoxideClick an option to check your answer
Q. 57
Which one of the following can be used as an acid-base indicator by a visually impaired (blind) student?
A
Vanilla essenceB
Petunia leavesC
TurmericD
LitmusClick an option to check your answer
Q. 58
What is done to separate insoluble impurities from the saturated salt solution?
A
FiltrationB
EvaporationC
DistillationD
CrystallizationClick an option to check your answer
Q. 59
What gas is passed through the saturated salt solution to separate out pure NaCl crystals?
A
Nitrogen gasB
Oxygen gasC
Hydrogen gasD
Hydrochloric acid (HCl) gasClick an option to check your answer
Q. 60
Which one of the given is true, if a substance has a pH value of 4?
A
The substance is a neutral substanceB
Either (1) or (2)C
The substance is a baseD
The substance is an acidClick an option to check your answer
Q. 61
What happens to the pH value as the concentration of hydronium ions increases?
A
pH value decreasesB
pH value increasesC
pH value remains constantD
pH value fluctuatesClick an option to check your answer
Q. 62
Tooth enamel is made up of
A
calcium carbonateB
calcium oxideC
potassiumD
calcium phosphateClick an option to check your answer
Q. 63
A solution reacts with crushed egg-shells to give a gas that turns lime-water milkey. The solution contains
A
HClB
LiClC
KClD
NaClClick an option to check your answer
Q. 64
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
A
VinegarB
An antacidC
Lemon juiceD
Common saltClick an option to check your answer
Q. 65
An aqueous solution with pH-zero is
A
AcidicB
AmphotericC
AlkalineD
NeutralClick an option to check your answer
Q. 66
The odour of acetic acid resembles that of
A
KeroseneB
VinegarC
RoseD
Burning PlasticClick an option to check your answer
Q. 67
Calcium phosphate is present in tooth enamel. Its nature is
A
basicB
amphotericC
neutralD
acidicClick an option to check your answer
Q. 68
While preparing soap a small quantity of common
salt is generally added to the reaction mixture of
vegetable oil and sodium hydroxide. Which one
of the following may be the purpose of adding
common salt?
A
To favour the precipitation of the soapB
To enhance the cleansing power of the soapC
To reduce the basic nature of the soapD
To make the soap neutralClick an option to check your answer
Q. 69
Choose the correct statement:
A
NaCl shows hygroscopic properties only due to impuritiesB
NaCl is a brown crystalline solidC
Pure NaCl is soluble in alcoholD
Pure NaCl is hygroscopic in nature by itselfClick an option to check your answer
Q. 70
Which of the following acid is also known as vinegar?
A
Dilute sulphuric acidB
Dilute acetic acidC
Dilute tartaric acidD
Dilute hydrochloric acidClick an option to check your answer
Q. 71
What is the nature of the new product which is
formed by the action of water on quick lime ?
A
BasicB
NeutralC
AmphotericD
AcidicClick an option to check your answer
Q. 72
During the preparation of hydrogen chloride gas
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 gasB
Moisten the gasC
Absorb moisture from the gasD
Absorb Cl- ions from the evolved gasClick an option to check your answer
Q. 73
What does compound D become when it absorbs water?
A
AnhydrousB
Hydrated saltC
Gaseous compoundD
Liquid solutionClick an option to check your answer
Q. 74
pH of a solution having hydrogen ion concentration of 1M is
A
0B
1C
10D
14Click an option to check your answer
Q. 75
What compound does the hydrated salt form when dissolved in water?
A
Compound CB
Compound DC
Compound FD
Compound GClick an option to check your answer
Q. 76
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ?
A
Baking powerB
Hydrochloric acidC
LimeD
Ammonium hydroxide solutionClick an option to check your answer
Q. 77
Alkalis are
A
acids, which are soluble in waterB
acids, which are insoluble in waterC
bases, which are soluble in waterD
bases, which are insoluble in waterClick an option to check your answer
Q. 78
Phenolphthalein turns acids to ________
solution.
A
orangeB
pinkC
colourfulD
colourlessClick an option to check your answer
Q. 79
Which range on the pH scale represents acidic solutions?
A
0 to 7B
7 to 14C
0 to 14D
7 onlyClick an option to check your answer
Q. 80
Due to excess passing of CO2 through an aqueous solution of slaked lime, its milkiness fades because
A
Due to the production of more heatB
Calcium carbonate is producedC
Calcium bi-carbonate is producedD
Calcium oxide is producedClick an option to check your answer
Q. 81
Which one of the following will turn red litmus blue?
A
Baking soda solutionB
Lemon juiceC
Soft drinksD
VinegarClick an option to check your answer
Q. 82
The pH value of a sample of hydrochloric acid
is 2. pH value of this sample when diluted by
adding water will be:
A
no change in pHB
less than 2 but more than 0C
more than 7D
more than 2 but less than 7Click an option to check your answer
Q. 83
Tooth enamel is made up of
A
potassiumB
calcium phosphateC
calcium carbonateD
calcium oxideClick an option to check your answer
Q. 84
What does the 'p' in pH stand for?
A
PowerB
PotentialC
ParticleD
ProtonClick an option to check your answer
Q. 85
Which of the following statement is not correct?
A
Raw onion can be used as olfactory indicator to check acid or base.B
Acids turn blue litmus solution redC
Vanilla essence does not give odour in strongly basic solutions.D
Bases are sour in taste.Click an option to check your answer
Q. 86
Which one of the following salts does not con-tain water of crystallisation?
A
GypsumB
Washing sodaC
Blue vitriolD
Baking sodaClick an option to check your answer
Q. 87
Sodium carbonate is a basic salt because it is a salt of a
A
strong acid and weak baseB
weak acid and strong baseC
weak acid and weak baseD
strong acid and strong baseClick an option to check your answer
Q. 88
Sodium carbonate is a basic salt because it is a salt of a
A
weak acid and strong baseB
strong acid and strong baseC
weak acid and weak baseD
strong acid and weak baseClick an option to check your answer
Q. 89
To protect tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is
A
neutralB
basicC
corrosiveD
acidicClick an option to check your answer
Q. 90
Which impurities are particularly undesirable in common salt?
A
Sulphates of sodium and magnesiumB
Chlorides of calcium and magnesiumC
Chlorides of sodium and potassiumD
Oxides of iron and aluminumClick an option to check your answer
Q. 91
To protect tooth decay we are advised to brush
our teeth regularly. The nature of the tooth paste
commonly used is :
A
BasicB
CorrosiveC
NeutralD
AcidicClick an option to check your answer
Q. 92
What kind of solution does compound F form when dissolved in water?
A
Weak acid and strong baseB
Weak acid and weak baseC
Strong acid and weak baseD
Strong acid and strong baseClick an option to check your answer
Q. 93
Sodium carbonate is a basic compound because it is a salt of a:
A
Strong acid and strong baseB
Weak acid and weak baseC
Strong acid and weak baseD
Weak acid and strong baseClick an option to check your answer
Q. 94
The pH of the gastric juices released during digestion is
A
equal to 0B
equal to 7C
more than 7D
less than 7Click an option to check your answer
Q. 95
Nettle sting is a natural source of which acid?
A
Tartaric acidB
MetiWanoic acidC
Citric acidD
Lactic acidClick an option to check your answer
Q. 96
What process does the hydrated salt undergo when it loses water molecules in the open air?
A
HydrationB
EfflorescenceC
CondensationD
EvaporationClick an option to check your answer
Q. 97
What pH value represents a neutral solution?
A
0B
7C
14D
Any value between 0 and 14Click an option to check your answer
Q. 98
What happens when a base is added to vanilla?
A
Vanilla loses its smellB
Nothing happensC
Vanilla becomes colorlessD
Color of vanilla changes into redClick an option to check your answer
Q. 99
Acids react with bases to form salt and water. This reaction is known as:
A
CombinationB
DecompositionC
reductionD
NeutralisationClick an option to check your answer
Q. 100
Which one of the following types of medicines is
used for treating indigestion?
A
AnalgesicB
AntacidC
AntisepticD
AntibioticClick an option to check your answer
Q. 101
The Ph of a solution of HCL is 4. This shows that the molarity of the solution is
A
0.001MB
0.0001MC
4.0MD
0.4MClick an option to check your answer
Q. 102
What is the pH value of sodium chloride?
A
More than 7B
Less than 7C
ZeroD
7Click an option to check your answer
Q. 103
Generally metals react with acids to give salt and
hydrogen gas. Which of the following acids does
not give hydrogen gas on reacting with metals
(except Mn and Mg) ?
A
All of theseB
HNO3C
H₂SO4D
HCIClick an option to check your answer
Q. 104
The chemical formula for plaster of Paris is :
A
CaSO4.1/2 H₂OB
CaSO4. 2H₂OC
2CaSO4.H₂OD
CaSO4. H₂OClick an option to check your answer
Q. 105
A student puts a drop of reaction mixture of a
saponification reaction first on a blue litmus paper
and then on a red litmus paper. He may observe
that:
A
There is no change in the blue litmus paper and the red litmus paper turns blue.B
There is no change in the blue litmus paper and the red litmus paper turns white.C
There is no change in the red litmus paper and the blue litmus paper turns red.Click an option to check your answer
Q. 106
Which impurities remain in the solution after passing HCl gas?
A
Insoluble impuritiesB
Sulphates of sodium and magnesiumC
Chlorides of calcium and magnesiumD
Soluble impuritiesClick an option to check your answer
Q. 107
Which one of these acid-base indicators is used
by a visually impaired student?
A
PhenolphthaleinB
VanillaC
TurmericD
LitmusClick an option to check your answer
Q. 108
Setting of Plaster of Paris takes place due to
A
HydrationB
OxidationC
ReductionD
DehydrationClick an option to check your answer
Q. 109
An aqueous solution with pH-zero is
A
AlkalineB
NeutralC
AmphotericD
AcidicClick an option to check your answer
Q. 110
When a bee stings, immediately a paste of lime is put on the sting. Why?
A
All of the above.B
Bee sting contains an acid called formic aci It gets neutralised with CaO .C
Bee sting is made of a baseD
Bee sting is acidic due to hydrochloric acid and this is neutralisedClick an option to check your answer
Q. 111
How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted?
A
Remains the sameB
Becomes zeroC
IncreasesD
DecreasesClick an option to check your answer
Q. 112
Calcium phosphate is present in tooth enamel. Its nature is
A
acidicB
neutralC
amphotericD
basicClick an option to check your answer
Q. 113
10 mL of a solution of NaOH is found to be
completely neutralised by 8 mL of a given solution
of HCl. If we take 20 mL of the same solution of
NaOH, the amount of HCl solution (the same
solution as before) required to neutralise it will
be:
A
16 mLB
4 mLC
8mLD
12 mLClick an option to check your answer
Q. 114
Many salts absorbs water from atmosphere. This property is called
A
additionB
hydrationC
efflorescenceD
deliquescenceClick an option to check your answer
Q. 115
Chemical formula of baking soda is:
A
Na2CO3B
NaHCO3C
MgCO3D
MgSO4Click an option to check your answer
Q. 116
Acids react with metals to liberate _________gas.
A
Carbon dioxideB
HydrogenC
WaterD
Carbon monoxideClick an option to check your answer
Q. 117
Sodium hydroxide is a
A
strong acidB
strong baseC
weak baseD
weak acidClick an option to check your answer
Q. 118
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
moisten the gasB
absorb the evolved gasC
absorb moisture from the gasD
absorb Cl– ions from the evolved gasClick an option to check your answer
Q. 119
When a bee stings, immediately a paste of lime is put on the sting. Why?
A
All of the above.B
Bee sting is made of a baseC
Bee sting contains an acid called formic acid) It gets neutralised with CaO .D
Bee sting is acidic due to hydrochloric acid and this is neutralisedClick an option to check your answer
Q. 120
What does a pH value less than 7 indicate?
A
Alkaline solutionB
Neutral solutionC
Acidic solutionD
No solutionClick an option to check your answer
Q. 121
An aqueous solution 'A' turns phenolphthalein
solution pink. On addition of an aqueous
solution 'B' to 'A', the pink colour disappears.
The following statement is true for solution 'A'
and 'B'.
A
A is strongly acidic and B is a weak acid.B
A has pH greater than 7 and B has pH less than 7.C
A has pH less than 7 and B has pH greater than 7Click an option to check your answer
Q. 122
What is formed when zinc reacts with sodium hydroxide?
A
Sodium zincate and hydrogen gasB
Zinc hydroxide and sodiumC
Sodium zincate and waterD
Sodium zinc-oxide and hydrogen gasClick an option to check your answer
Q. 123
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 moisture from the gasB
absorb Cl– ions from the evolved gasC
moisten the gasD
absorb the evolved gasClick an option to check your answer
Q. 124
Phenolphthalein’s colour in basic medium is ____but in acid it is ______.
A
Yellow, PinkB
Pink, ColorlessC
Blue, RedD
Pink, OrangeClick an option to check your answer
Q. 125
In terms of acidic strength, which one of the following is in the correct increasing order?
A
Hydrochloric acid < Water < Acetic acidB
Water < Acetic acid < Hydrochloric acidC
Water < Hydrochloric acid < Acetic acidD
Acetic acid < Water < Hydrochloric acidClick an option to check your answer
Q. 126
Which of the following gives the correct increasing order of acidic strength ?
A
Hydrochloric acid < Water < Acetic acidB
Acetic acid < Water < Hydrochloric acidC
Water < Hydrochloric acid < Acetic acidD
Water < Acetic acid < Hydrochloric acidClick an option to check your answer
Q. 127
Black ash is
A
Hydrated KOHB
CharcoalC
Barium sulphideD
Dry KOHClick an option to check your answer
Q. 128
Compound C is a constituent of:
A
SaltB
SugarC
Baking powderD
VinegarClick an option to check your answer
Q. 129
What does the pH scale measure?
A
TemperatureB
DensityC
Acidity or basicityD
PressureClick an option to check your answer
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