Multiple Choice Questions (MCQs) on Acids, bases and salts from Text Book
1. Corrosive effect on skin is caused by
(a) acid
(b) base
(c) salt
(d) both a and b
2. Preservatives are used preserve
(a) acid
(b) base
(c) food
(d) water
3. Which of the following is NOT an Arrhenius acid?
(a) HCl
(b) CO2
(c) HNO3
(d) H2SO4
4. NH3 can be a base according to
(a) Arrhenius theory
(b) Bronsted-Lowry theory
(c) Lewis theory
(d) both b and c
5. Which of the following is a Lewis base?
(a) HNO3
(b) CN−
(c) HCl
(d) AlCl3
6. A substance that can donate a pair of electrons to form coordinate covalent bond
(a) Bronsted-Lowry base
(b) Bronsted Lowry acid
(c) Lewis acid
(d) Lewis base
7. If pH value is greater than 7, then solution is
(a) acidic
(b) basic
(c) amphotetic
(d) neutral
8. Salt among following is
(a) HCl
(b) KCl
(c) HNO3
(d) H2SO4
9. Substance that react with both acids and bases are called
(a) Amphotetic substances
(b) conjugate acids
(c) conjugate base
(d) buffers
10. The reaction of acid and base to form salt and water is called
(a) Hydration
(b) Neutralization
(c) Hydrolysis
(d) both a and c
Answers of MCQs on Acids, bases
and salts from Text Book
1…….. D
2.…….. C
3.…….. B
4.…….. D
5.…….. B
6.…….. D
7.…….. B
8.…….. B
9.…….. A
10.…… B
Multiple Choice Questions (MCQs) on Acids, bases and salts from Past Papers and External Source
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1. The substance whose aqueous solution change the blue litmus to red:
(a) Acids
(b) Bases
(c) salts
(d) neutral
2. The substances having a tendency to lose one or more protons are called:
(a) Acids
(b) Bases
(c) salts
(d) neutral
3. The
substance which donate the pair of electrons for bond formation are known as:
(a) Acids
(b) Bases
(c) Salts
(d) Neutral
4. When equivalent quantities of acid and base are mixed, salt and water are formed, the reaction is termed as:
(a) Hydration
(b) hydrolysis
(c) Neutralization
(d) None of these
5. The acids which contain one acidic hydrogen are called
(a) Diprotic
(b) Monoprotic
(c) Triprotic
(d) Polyprotic
6. The number of acidic hydrogen atoms present in a molecule of an acid is called:
(a) Acidity
(b) Basicity
(c) Neutrality
(d) Hydrolysis
7. The number of replaceable OH− ions
present in a molecule of base is called:
(a) Acidity
(b) Basicity
(c) Neutrality
(d)
Hydrolysis
8. An ionic compound that is formed when
an acid neutralizes a base is called:
(a) Acids
(b) Bases
(c) Salts
(d)
Indicator
9. The formula of washing soda is:
(a) Na2CO3
(b) Na2CO3.6H2O
(c) Na2CO3.10H2O
(d) NaHCO3
10. The
formula of baking soda is ……………..
(a) Na2CO3
(b) Na2CO3.6H2O
(c) Na2CO3.10H2O
(d)
NaHCO3
11.The formula of Epsom salt is ………….
(a) Na2CO3
(b) MgSO4.7H2O
(c) Na2CO3.10H2O
(d) NaHCO3
12. A solution whose strength is known is called ………….
(a) Molar solution
(b) Standard solution
(c) Normal solution
(d) None of them
13. If H+ ion concentration of a solution is 1 x 10−14 M, the solution is ………..
(a) Molar solution
(b) Acidic solution
(c) Neutral solution
(d) Basic Solution
14. If the OH− ion concentration of a solution is 1 x 10−10
M, solution is ……….
(a) basic
(b) Acidic
(c) Neutral
(d) Normal
15. The solution whose pH is 6, then its H+ ion
concentration is ……………
(a) 1 x 10−4 M
(b) 1 x 10−6 M
(c) 1 x 10−14 M
(d)
1 x 10−2 M
16. …………..
is the process by which we can determine the concentration of unknown solution
with the help of standard solution.
(a) Titration
(b) Sublimation
(c) Crystallization
(d)
None of them
17. The volume of a pipette is generally …………
ml or cm3.
(a) 10
(b) 20
(c) 25
(d) 50
18. The solution whose H+ ion concentration
is 1 x 10−4 M, then its pH is ………..
(a) 4
(b) 8
(c) 7
(d) 10
19. The pH
value of Human blood is
(a) 7.35-7.45
(b) 7.8
(c) 7.2
(d)
7.0
20. The
formula of sodium hydrogencarbonate is
(a) Na2CO3
(b) NaHCO3
(c) Na2CO3.10H2O
(d) Na2CO3.6H2O
21. The pH
value of distilled water is
(a) 1
(b) 4
(c) 7
(d) 14
22. Chemically
strong acid is
(a) Acetic acid
(b) Nitric acid
(c) Hydrochloric acid
(d) Sulphuric acid
23. What
is the pH of a neutral solution?
(a) 0
(b) 1
(c) 7
(d) 14
24. The pH
value of saliva is
(a) 4.2
(b) 6.5
(c) 7.0
(d)
7.8
25. Which of the following substances is called proton donor?
(a) Acids
(b) Bases
(c) Salts
(d)
Alkali
26. It is
a proton donor
(a) Acid
(b) Base
(c) Salt
(d)
Alkali
27. A
specie formed by the loss of proton from an acid is called a…………..
(a) Lewis base
(b) Conjugate base
(c) Conjugate acid
(d)
Arrhenius acid
28. A
specie formed by the addition of a proton to a base is called ………..
(a) Lewis base
(b) Conjugate base
(c) Conjugate acid
(d)
Arrhenius acid
29.In the
reaction; NH3 + HCl → NH4+
+ Cl–; which one is
conjugate base?
(a) NH3
(b) HCl
(c) Cl–
(d) NH4+
30. In the
reaction; CH3COOH + H2O
⇌ H3O+ + CH3COO–; which one is conjugate base?
(a) H3O+
(b) H2O
(c) CH3COO–
(d)
CH3COOH
31. In the
reaction; NH3 + H2O
⇌ NH4+ + OH–, which one is conjugate acid?
(a) NH3
(b) H2O
(c) OH–
(d)
NH4+
32. The
conjugate base of a strong acid is always a……………
(a) Weak base
(b) Weak acid
(c) Strong acid
(d)
Strong acid
33. The
conjugate acid of a strong base is always a……………
(a) Weak base
(b) Weak acid
(c) Strong acid
(d) Strong acid
34. HCl is a strong acid since its conjugate base Cl– is a………….
(a) Weak base
(b) Weak acid
(c) Strong acid
(d)
Strong acid
35. Which
one of the following is a monoprotic acid?
(a) H2C2O4
(b) H2SO4
(c) H4C2O2
(d) C6H4(COOH)2
36. Which
one of the following is not a dibasic
acid?
(a) H2C2O4
(b) H–HSO4
(c) H6C4O4 (succinic acid)
(d) H3BO3
37. Which
one is not a Lewis base?
(a) NH3
(b) NaNH2
(c) C2H5OH
(d)
AlCl3
38. Which
one is not a Lewis acid?
(a) AlCl3
(b) FeCl3
(c) BF3
(d)
NH3
39.The
value of ionic product (Kw) of water at 25ºC is equal to:
(a) 1 x 1014
(b) 1 x 10-14
(c) 1 x 10-7
(d) 1 x x 10-10
40. The
sum of pH and pOH of any solution at 25ºC is:
(a) 7
(b) 9
(c) 14
(d) 3
41. A
solution which contains [H+] concentration equal to 10-7 M
is said to be:
(a) Acidic
(b) Neutral
(c) Basic
(d) Alkaline
42. A
solution which contains [H+] concentration less than 10-7 M
is said to be:
(a) Acidic
(b) Basic
(c) Alkaline
(d) Neutral
43. A
solution which contains [H+] concentration greater than 10-7 M
is said to be:
(a) Acidic
(b) Basic
(c) Neutral
(d) Amphoteric
44. The
hydroxyl ion concentration in a solution having pH value 3 will be:
(a) 10-14 M
(b) 10-7 M
(c) 10-12 M
(d) 10-11 M
45. The
hydroxyl ion concentration in a solution having pH value 12 will be:
(a) 10-2 M
(b) 10-7 M
(c) 10-12 M
(d) 10-10 M
46. The pH
of a solution with hydrogen ion concentration of 1 x 10-3
is:
(a) 3
(b) 2
(c) 1
(d) 11
47. The pH
of a solution that has 0.00001 mole of H+ per liter of solution is:
(a) 2
(b) 5
(c) 4
(d) 9
48. Which
one of the following substances has pH value less than 7?
(a) Milk of magnesia
(b) Sea water
(c) Blood
(d)
Milk
49. Which
one of the following substances has pH value more than 7?
(a) Vinegar
(b) Sodium carbonate
(c) Sulphuric acid
(d)
Soda water
50. Which
of the following salts has no water of crystallization?
(a) Gypsum
(b) Blue vitriol
(c) Baking soda
(d) Washing
soda
51. Metal carbonate on reaction with dilute
acid release
(a) CO2
(b) H2O
(c) CO
(d)
H2
52. ln general, dissolution of acid or base in
water is
(a) Exothermic
(b) Endothermic
(c) Violent
(d)
None of these
53. Hydrogen
ions produced by acid exist in which of the following form?
(a) hydroxonium ions
(b) Hydrogen
(c) Water ions
(d)
Hydroxide ions
54. The acid found in an ant
sting is
(a) Tartaric acid
(b) citric acid
(c) Methanoic acid
(d) Acetic acid
55. Which
one of the following acid in not monoprotic?
(a) H3BO3
(b) CH3COOH
(c) HNO3
(d) HO-SO3H
56. Universal
indicator turns red in:
(a) Acid solution
(b) Alkaline solution
(c) Neutral solution
(d) Basic
solution
57. The pH
of milk is:
(a) 7.3
(b) 6.0
(c) 6.3
(d) 5.6
58. 7.3 is
the pH of:
(a) Human blood
(b) Tomato juice
(c) Vinegar
(d) Milk
59. The acids which contain two or more acidic
hydrogens are called:
(a) monoprotic
(b) Diprotic
(c) Triprotic
(d)
Polyprotic
60. The basicity refers to the number of ionizable
………… ions:
(a) H+
(b) OH−
(c) H2
(d) both
a and b
61. If H+
ions concentration of solution is 1 x 100 M, then solution is
strongly
(a) Acidic
(b) Basic
(c) Neutral
(d) Amphoteric
62. Universal
indicator turns green in:
(a) Neutral solution
(b) Alkaline solution
(c) Acid solution
(d) Basic solution
63. The pH
of saliva is:
(a) 7.3
(b) 6.0
(c) 6.3
(d) 5.6
64. Which
one of the following is not a strong acid?
(a) HF
(b) HNO3
(c) HCl
(d) H2SO4
65. What will be the value of pH of
10−5 M NaOH solution?
(a) 5
(b) 8
(c) 9
(d) 10
66. What
is the pH of a 0.00001 molar HCl solution?
(a) 1
(b) 9
(c) 5
(d) 4
67. The pH of milk of magnesia is
(a) 1.2 %
(b) 1.4 %
(c) 1.9 %
(d) 2.1
%
69. What
is the pOH of a solution whose pH is 8?
(a) 6
(b) 10
(c) 4
(d) 2
70. Lime water turns milky when carbon dioxide
is passed due to the formation of ______.
(a) CaCO3
(b) CO2
(c) CaO
(d) CaSO4
71. Which ion is not present in dilute
sulfuric acid?
(a) H+
(b) OH–
(c) SO32–
(d) SO42–
72. Which oxide will produce the solution with the highest pH when
it is mixed with water?
(a) Al2O3
(b) SO2
(c) Na2O
(d) CO2
73. metal
carbonate on reaction with dilute acid release:
(a) H2O
(b) H2
(c) CO2
(d)CO
74. Identify the conjugate acid of SO42−
(a) H2SO4
(b) SO32−
(c) HSO4−
(d) H2SO3
75. Which one of the following is a weak acid?
(a) HF
(b) HClO3
(c) HNO3
(d) HI
76. Which one of the
following is a strong
electrolyte?
(a) HF
(b) KF
(c) HNO2
(d) (CH3)3N
77. Which of the following is classified as a
conjugate acid-base pair?
(a) HCl/NaOH
(b) H3O+
(c) O2/H2O
(d) H+/Cl−
78. pOH of
pure water at 25ºC is _____________.
(a) 7
(b) 14
(c) 0
(d) -7
79. Acid + Metal oxide → -----------
(a) Base + water
(b) Base + salt
(c) Salt + water (d) Metal + salt
80. What is formed by the reaction of a non-metal oxide with water?
(a) Acid
(b) Base
(c) Salt
(d) Metal
81. Which of the following solutions is most basic?
(a) pH = 10.6
(b) pH = 11.5
(c) pH = 9.3
(d) pH = 8.2
82. What is used to measure the exact pH of an aqueous
solution?
(a) pH paper
(b)Universal indicator
(c) pH meter
(d) Litmus paper
83. Which of the following substances is an antacid?
(a) NaCl
(b) Mg(OH)2
(c) HCl
(d) H2SO4
84. The pH values of solutions A, B, C and D are 1.9, 2.5,
2.1 & 3.0, respectively. Their order of acidity will be
(a) D < C < B < A [C]
(b) D > C > B > A
(c) A < C < B < D [B]
(d) D < B < C < A
85. Which solution will be basic?
(a) [H3O+] = 10−5 M
(b) [H3O+] = 10−12 M
(c) [H3O+] = 10−7 M
(d) [H3O+] = 10−4
M
86. The bond between H+ and H2O in H3O+ is...
(a) Coordinate covalent
(b) Covalent
(c) Metallic
(d) Ionic
87. The
hydroxonium ion is
(a) Hydrated proton
(b) Protonated water molecules
(c) Both of them
(d) None of them
88. Whose definition of acids and bases
emphasizes the role of protons?
(a) Brønsted and Lowry
(b) Arrhenius
(c) Faraday
(d) Lewis
89. An electron-pair acceptor is a
(a) Lewis base
(b) Brønsted-Lowry base
(c) Lewis acid
(d)
traditional acid
90. What is the pH of 1 x 10–4 M HCl
solution?
(a) 4
(b) 10
(c) 8
(d) 6
91. What is the pH of a 1 x 10–5 M
KOH solution?
(a) 3
(b) 5
(c) 9
(d) 11
92. Which are the correct products for these
reactants H2SO4 + NaOH?
(a) Na2SO4 + H2O
(b) Na2SO4 + OH–
(c) NaHSO4 + H2O
(d)
Both a and c
93. Which
element is always present in Arrhenius acid?
(a) Nitrogen
(b) Hydrogen
(c) Oxygen
(d)
None of these
94. Which
one of the following is a strong electrolyte?
(a) HF
(b) KF
(c) HNO2
(d) H2O
95. The
conjugate base of HSO4– is
(a) H2SO4
(b) H3SO4+
(c) SO42–
(d)
HSO4+
96. Which
of the given is a strong base?
(a) Potassium hydroxide
(b) Magnesium hydroxide
(c) Ammonium hydroxide
(d) Calcium hydroxide
97. A Bronsted-Lowry base is defined as:
(a) a hydroxide acceptor
(b) an electron pair acceptor
(c) a proton acceptor
(d) a hydroxide donor
98. The
conjugate acid of HSO4– is
(a) H2SO4
(b) HSO4 +
(c) SO42–
(d)
HSO3+
99.According to Arrhenius acid-base theory,
in neutralization reaction, which molecule is formed?
(a) CO2
(b) H2O2
(c) H2O
(d) H2
100. The
conjugate acid of HPO32– is
(a) HPO32−
(b) H2PO31−
(c) PO33−
(d) H3PO3
101. The
conjugate base of NH3 is
(a) NH4+
(b) NH2–
(c) NH2–
(d)
None of them
102. A
conjugate acid forms a conjugate base by ……. of a proton
(a) Accepting
(b) Donating
(c) Gaining
(d) None of
them
103. A
strong base would have a ……… conjugate acid.
(a) Strong
(b) Very strong
(c) Weak
(d)
None of them
104. The
conjugate acid of O2– is
(a) OH−
(b) H2O
(c) H3O+
(d)
None of them
105. ……
acid-base theory cannot define that NH3 is a base
(a) Lewis
(b) Bronsted-Lowry
(c) Arrhenius
(d) None of
them
106. HSO4–
is conjugate acid of ….
(a) H2SO4
(b) SO42–
(c) H2O
(d)
None of them
107. Which of these species will act as a Lewis acid?
(a) NH3
(b) H2O
(c) NH4+
(d) BF3
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