Chemistry Class 10 Chapter 2
Updated: 13 Dec 2023
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Chemistry Class 10 Chapter 2 introduces the concept of “Acids, Bases and Salts”. This is mainly chapter No. 10, “Acids, Bases and Salts”, of the book.
This article consists of Notes, SLO Based Notes and MCQs of chemistry, which cover your course, board papers and clear your chemistry concept for different types of tests.
Chemistry Class 10 Chapter 2 Notes
Acids, Bases and Salts
SLO Based Questions
Chemistry Class 10 Chapter 2 MCQs
1. The sour taste is due to an __________ called citric acid.(a) acid
(b) base
(c) salt
(d) None of these
Show Answer
acid
2. Bases have __________taste and soapy to touch.
(a) sour
(b) bitter
(c) neutral
(d) None of these
Show Answer
bitter
3. The __________ are formed by the reaction of acid and base.
(a) acid
(b) base
(c) salts
(d) None of these
Show Answer
salts
4. Lactic acid is present in __________.
(a) milk
(b) beans
(c) vinegar
(d) None of these
Show Answer
milk
5. Citric acid is present in __________.
(a) Mango
(b) Lemons
(c) Carbonated drinks
(d) None of these
Show Answer
Lemons
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6. Which acid is present in insects?(a) Carbonated drinks
(b) Ammonia
(c) Formic acid
(d) None of these
Show Answer
Formic acid
7. Oxalic acid is present in __________.
(a) spinach
(b) cucumber
(c) cereals
(d) None of these
Show Answer
spinach
8. Which acid is present in grapes?
(a) Malic acid
(b) Tartaric acid
(c) Methyl orange
(d) None of these
Show Answer
Tartaric acid
9. The word acid is derived from a __________ word acid.
(a) Greek
(b) Hebrew
(c) Latin
(d) None of these
Show Answer
Latin
10. Acidus means__________.
(a) sour
(b) Bitter
(c) spicy
(d) None of these
Show Answer
sour
11. Acids turn blue __________into red.
(a) filter paper
(b) litmus paper
(c) tissue paper
(d) None of these
Show Answer
litmus paper
12. Acids change the colour of acid-base _______________.
(a) Indicators
(b) catalysts
(c) masking agents
(d) None of these
Show Answer
Indicators
13. Aqueous solution of acid is a _________conductor.
(a) bad conductor
(b) good conductor
(c) Insulator
(d) None of these
Show Answer
good conductor
14. Strong acids are very ___________.
(a) corrosive
(b) explosive
(c) nedrant
(d) None of these
Show Answer
corrosive
15. A base is any metal oxide or hydroxide that reacts with acid to produce salt and ___________.
(a) Ammonia
(b) Water
(c) Sulphuric acid
(d) None of these
Show Answer
Water
16. The water soluble base is called___________.
(a) Halogen
(b) Metal
(c) Alkali
(d) None of these
Show Answer
Alkali
17. In aqueous solution, a base produces ___________ ions.
(a) OH^-
(b) H^+
(c) Cl^-
(d) None of these
Show Answer
OH^-
18. All alkalis are ___________but all bases are not alkalis.
(a) acids
(b) bases
(c) liquor
(d) None of these
Show Answer
bases
19. Bases turns red litmus paper into ___________.
(a) Orange
(b) Violet
(c) Blue
(d) None of these
Show Answer
Blue
20. Bases also changes the colour of acid-base___________.
(a) Indicators
(b) catalysts
(c) reagents
(d) None of these
Show Answer
Indicators
21. Strong bases are also___________.
(a) explosive
(b) corrosive
(c) soaky
(d) None of these
Show Answer
corrosive
22. Strong bases are ___________ when dissolved in water.
(a) Good conductor
(b) Bad conductor
(c) Insulator
(d) None of these
Show Answer
Good conductor
23. In ___________, a Swedish chemist, Svante Arrhenius presented the first concept about acid and base.
(a) 1880
(b) 1884
(c) 1888
(d) 1892
Show Answer
1884
24. According to Arrhenius, an acid is a chemical substance that dissociates in aqueous solution to give ________.
(a) Cl^-
(b) OH^-
(c) H^+
(d) K^-
Show Answer
H^+
25. Complete the reaction : HCl \quad \xrightarrow{water} ___________.
(a) H^+ + Cl^ –
(b) H^- + Cl^+
(c) H + Cl
(d) None of these
Show Answer
H^+ + Cl^-
26. HCL, H_2SO_4 ,HNO_3 , HCN are the examples of ___________ acids.
(a) Arrhenius
(b) Bronsted
(c) Lowery
(d) None of these
Show Answer
Arrhenius
27. Arrhenius base is a chemical substance that dissociates in aqueous solution to give___________ .
(a) H^+
(b) OH^-
(c) H^-
(d) OH^+
Show Answer
OH^-
28. Complete the reaction : NaOH \quad \xrightarrow{water} _____________.
(a) Na^+ + OH^-
(b) Na +OH
(c) Na^- + OH^+
(d) None of these
Show Answer
Na^+ + OH^-
29. KOH, NH_4OH, Mg(OH)_2, Ca(OH)_2 are the examples of __________bases.
(a) Arrhenius
(b) Lewis
(c) Bronsted
(d) None of these
Show Answer
Arrhenius
30. Arrhenius concept is only limited to __________ medium.
(a) Air
(b) Vacuum
(c) Aqueous
(d) None of these
Show Answer
Aqueous
31. Arrhenius concept cannot explain the acidic nature of __________.
(a) NH_3
(b) CO_2
(c) H2_O
(d) None of these
Show Answer
CO_2
32. Arrhenius concept cannot explain the basic nature of __________.
(a) NH_3
(b) CO_2
(c) H2_O
(d) None of these
Show Answer
NH_3
33. J.N. Bronstedand T.M. Lowery presented their own concept about acid and bases in __________.
(a) 1913
(b) 1919
(c) 1923
(d) 1929
Show Answer
1923
34. Bronsted-Lowery acid is a substance that is a __________.
(a) Proton acceptor
(b) Proton donor
(c) OH- acceptor
(d) None of these
Show Answer
Proton donor
35. Bronsted – Lowery base is a substance that is a __________.
(a) Proton acceptor
(b) Proton donor
(c) OH^- acceptor
(d) None of these
Show Answer
Proton acceptor
36. Hydrochloric acid (HCl) acts as a Bronsted- Lowery __________ with it reacts with Ammonia (NH_3) .
(a) Base
(b) Acid
(c) Lewis acid
(d) None of these
Show Answer
Acid
37. Ammonia (NH_3) acts as a Bronsted –Lowery __________ when it reacts with HCl .
(a) Acid
(b) Base
(c) Arrhenius acid
(d) None of these
Show Answer
Base
38. When an acid gives a proton (H^+) and forms negatively charged species which can accept proton and act as a base is called a __________.
(a) Conjugate base
(b) Conjugate acid
(c) Lewis base
(d) None of these
Show Answer
Conjugate base
39. CH_3COO^– is a conjugate __________.
(a) Acid
(b) Base
(c) Salt
(d) None of these
Show Answer
Base
40. When a base takes a proton and forms positively charged specie which can act as an acid is called a ______.
(a) Conjugate base
(b) Conjugate acid
(c) Salt
(d) None of these
Show Answer
Conjugate acid
41. The example of conjugate acid is __________.
(a) NH_4^+
(b) NH_3^+
(c) OH^-
(d) NH_2^-
Show Answer
NH_4^+
42. Third concept of acid and base was introduced by __________.
(a) Thorndike
(b) SathyaParkash
(c) G.N. Lewis
(d) None of these
Show Answer
G.N. Lewis
43. Lewis introduced his concept of acid and base in__________.
(a) 1909
(b) 1923
(c) 1917
(d) 1927
Show Answer
1923
44. Lewis acid is a specie that __________ a pair of electrons.
(a) Accepts
(b) Rejects
(c) Donate
(d) None of these
Show Answer
Accepts
45. Lewis base is a specie that donates a pair of __________.
(a) Radicals
(b) Ions
(c) Electrons
(d) Protons
Show Answer
Electrons
46. An acid-base reaction involves the donation of electrons pairs from a base to on acid forms a _______bond.
(a) Coordinate covalent
(b) Covalent
(c) Ionic
(d) None of these
Show Answer
Coordinate covalent
47. Compounds having less than __________ in their valence shall can act as Lewis acids.
(a) 8 electrons
(b) 8 protons
(c) 9 eelctrons
(d) None of these
Show Answer
8 electrons
48. BF_3 is a __________.
(a) Lewis acid
(b) Arrhenius acid
(c) Bronsted-Lowery acid
(d) None of these
Show Answer
Lewis acid
49. NH_3 is a __________.
(a) Arrhenius base
(b) Bronsted-Lowery base
(c) Lewis base
(d) None of these
Show Answer
Lewis base
50. The acids which produce__________ per molecule are called monoprotic acids.
(a) One proton
(b) One electron
(c) Many proton
(d) Many electron
Show Answer
One proton
51. HCl, HNO_3 , HCN are the examples of __________ acids.
(a) Mono acid
(b) Mono-protic
(c) Poly-protic
(d) None of these
Show Answer
Mono-protic
52. The acids which produce __________ one proton per molecule are called poly-protic acids.
(a) Equals to
(b) Less than
(c) More then
(d) None of these
Show Answer
More then
53. H_2SO_4 is an example of __________ acid.
(a) Diprotic
(b) Triprotic
(c) Monoprotic
(d) None of these
Show Answer
Diprotic
54. H_3PO_4 is an example of __________ acid.
(a) Diprotic
(b) Triprotic
(c) Telraprotic
(d) None of these
Show Answer
Triprotic
55. The bases which produce __________ ion per molecule in an aqueous solution are called monoacid bases.
(a) One H^+
(b) Many H^+
(c) One OH^-
(d) Many OH^-
Show Answer
One OH^-
56. Which one is the example of monoacid base?
(a) NaOH, KOH
(b) CH_3COOH
(c) Ba(OH)_2
(d) None of these
Show Answer
NaOH, KoH
57. The bases which produce more than one __________ per molecule in aqueous solution are called monoacid bases.
(a) Na^+ \ ion
(b) OH^- \ ion
(c) SO^-_3
(d) None of these
Show Answer
OH^- ion
58. The correct examples of poly-acid bases are:
(a) Ba(OH), Fe (OH_)3, Al(OH)_3
(b) NaOH, KOH, NH_4OH
(c) H_3PO_4, HNO_3, HCl
(d) None of these
Show Answer
Ba(OH), Fe (OH_)3, Al(OH)_3
59. A strong acid is one which ionizes __________ in aqueous solution.
(a) Largely
(b) Completely
(c) Partially
(d) None of these
Show Answer
Completely
60. A strong acid gives ________ concentration of H^+ ions.
(a) Higher
(b) Intermediate
(c) Lower
(d) None of these
Show Answer
Higher
61. A strong acid is a strong __________.
(a) Conductor
(b) Insulator
(c) Electrolyte
(d) None of these
Show Answer
Electrolyte
62. HCl, HNO_3, HClO_4 are the examples of __________.
(a) Weak acid
(b) Strong acids
(c) Strong bases
(d) None of these
Show Answer
Strong acids
63. A weak acid is one which ionizes ________ in aqueous solution.
(a) Largely
(b) Completely
(c) Partially
(d) None of these
Show Answer
Partially
64. A weak acid gives _______lower concentration of H^+ ions.
(a) Lower
(b) Intermediate
(c) Higher
(d) None of these
Show Answer
Lower
65. CH_3COOH, HNO_2, H_2SO_3, H_2CO_3 are the examples of __________.
(a) Weak acid
(b) Strong acid
(c) Weak base
(d) None of these
Show Answer
Weak acid
66. The base which completely dissociates in _________is called strong base.
(a) Alcohol solution
(b) Vinegar
(c) Aqueous solution
(d) None of these
Show Answer
Aqueous solution
67. Strong base gives higher concentration of ______.
(a) H^+ \ ions
(b) OH^- \ions
(c) NH_4^+ \ions
(d) None of these
Show Answer
OH^- ions
68. The example of strong base are:
(a) NaOH, KOH, LiOH
(b) HCl, H_2SO_4
(c) HNO_2, H_2SO_3
(d) None of these
Show Answer
NaOH, KOH, LiOH
69. The bases which ________ dissociates in aqueous solution are called weak bases.
(a) Completely
(b) Partially
(c) Fully
(d) None of these
Show Answer
Partially
70. Weak base gives ________ concentration of OH- ions.
(a) Higher
(b) Intermediate
(c) Lower
(d) None of these
Show Answer
Lower
71. The examples of weak base are:
(a) NH_4OH, Ca(OH)_2
(b) LiOH, KOH
(c) HCl, HNO_3
(d) None of these
Show Answer
NH_4OH, Ca(OH)_2
72. Those substance which can act both as an acid and a base are called ______substances.
(a) Alcohlic
(b) Amphoteric
(c) Atomic
(d) None of these
Show Answer
Amphoteric
73. The prime example of amphoteric substance is ;
(a) H3O+
(b) HBr
(c) H2O
(d) Pb
Show Answer
H2O
74. The experiments have shown that pure water is extremely _______electrolyte.
(a) Weak
(b) Strong
(c) Negligible
(d) None of these
Show Answer
Weak
75. Water undergoes self-ionization to a very __________.
(a) Large extent
(b) Small extent
(c) None
(d) None of these
Show Answer
Small extent
76. The reaction in which ______ molecules produce ions is called self/ auto ionization of water.
(a) Two water
(b) Two salt
(c) Both
(d) None of these
Show Answer
Two water
77. In auto ionization of water, two molecules of water produce ________ ion.
(a) Lead
(b) Thorium
(c) Hydronium
(d) All
Show Answer
Hydronium
78. Conductivity experiments shown that the product of H^+ and OH^- ions in pure water is always ______ mol/dm^3 of water at 25 {}^oC .
(a) 1.0 \times 10^{-14}
(b) 0.1 \times 10^{14}
(c) 10.0 \times 10^{10}
(d) None of these
Show Answer
1.0 \times 10^{-14}
79. Water dissociation constant is represented by __________.
(a) K_c
(b) K_d
(c) K_w
(d) None of these
Show Answer
K_w
80. In______, Peter Sorenson proposed a scale for the measurement of strength of acids and bases.
(a) 1909
(b) 1912
(c) 1915
(d) 1918
Show Answer
1909
81. We can determine the strength of acids on a __________ scale.
(a) pOH
(b) PH
(c) Filter paper
(d) None of these
Show Answer
PH
82. We can also determine the strength of basis on a _________scale.
(a) pOH
(b) pH
(c) Unique
(d) None of these
Show Answer
pOH
83. In pH and pOH, the “p” stands for __________ which means potential to be.
(a) Proton
(b) Protenz
(c) Peers
(d) None of these
Show Answer
Protenz
84. In pH scale ranges from__________.
(a) 5 – 10
(b) 10 –14
(c) 0—14
(d) None of these
Show Answer
0—14
85. The pH of a solution is the negative _______ of the molar concentration of H^+ ions.
(a) Logarithm
(b) Product
(c) Integral multiple
(d) None of these
Show Answer
Logarithm
86. In pH scale, the number 7 value is for __________.
(a) Acidic
(b) Neutral
(c) Basic
(d) None of these
Show Answer
Neutral
87. The pOH of a solution is the ______logarithm of molar concentration of OH^- ions.
(a) Negative
(b) Positive
(c) Multiplicative
(d) None of these
Show Answer
Negative
88. The pH value of vinegar is __________.
(a) 1 – 3
(b) 5 – 6
(c) 2.4 – 3.4
(d) None of these
Show Answer
2.4 – 3.4
89. The pH value of blood is __________.
(a) 8 to 8.5
(b) 7.3 to 7.5
(c) 10.5
(d) None of these
Show Answer
7.3 to 7.5
90. When the concentration of H+ ions and OH^- ions is equal in solution is called ________solution.
(a) Acidic
(b) Neutral
(c) Basic
(d) None of these
Show Answer
Neutral
91. Solution in which the concentration of H^+ ions is grater then the concentration of OH^- ions are called_______ solution.
(a) Acidic
(b) Neutral
(c) Basic
(d) None of these
Show Answer
Acidic
92. Solution in which, concentration of OH-ions is greater than the concentration of H^+ ions are called ________solution.
(a) Acidic
(b) Neutral
(c) Basic
(d) None of these
Show Answer
Basic
93. Neutralization is a chemical reaction in which acid and base react to form ______and water.
(a) Salt
(b) Metal oxides
(c) Nobel gases
(d) None of these
Show Answer
Salt
94. When HCl and NaOH reacts with each other, the products will be:
(a) H^+, OH^-
(b) HNa, ClOH
(c) NaCl + H_2O
(d) None of these
Show Answer
NaCl + H_2O
95. In _______solutions, neutralization is the reaction of hydrogen ions and hydroxide ions to form water.
(a) Alcoholic
(b) Aqueous
(c) Both a and b
(d) None of these
Show Answer
Aqueous
96. A compound formed due to _______ reaction of acid and base is called salt.
(a) Neutralization
(b) Fermentation
(c) Oxidation
(d) None of these
Show Answer
Neutralization
97. Sodium chloride and silver bromide are the examples of __________.
(a) Base
(b) Salt
(c) Acid
(d) None of these
Show Answer
Salt
98. Soluble salts are usually prepared in ________medium.
(a) Aqueous
(b) Gaseous
(c) Solid
(d) None of these
Show Answer
Aqueous
99. Soluble salts can be recovered by evaporation and ________ processes.
(a) Distillation
(b) Reduction
(c) Crystallization
(d) None of these
Show Answer
Crystallization
100. Soluble salts can be prepared by _______ different methods.
(a) 04
(b) 10
(c) Many
(d) None of these
Show Answer
04
101. Insoluble salt can be prepared by _________ method.
(a) 04
(b) 01
(c) 15
(d) None of these
Show Answer
01
102. Insoluble salts are obtained during ________reaction.
(a) Physical
(b) Pharmaceutical
(c) Chemical
(d) None of these
Show Answer
Chemical
103. Precipitation is the method of preparing _________ salts.
(a) Insoluble
(b) Soluble
(c) Both a and b
(d) None of these
Show Answer
Insoluble
104. When hydrogen ion of an acid are completely replaced by ______ion is called neutral salt .
(a) Metal
(b) Hydroxide
(c) Lanthanide
(d) None of these
Show Answer
Metal
105. Neutral salts are formed when a ________acid and base is neutralized in the reaction.
(a) Weak
(b) Average
(c) Strong
(d) None of these
Show Answer
Strong
106. When _________ of an acid are partially replaced by metal ion is called acidic salt.
(a) OH^- ions
(b) H^+ ions
(c) Na^+ ions
(d) None of these
Show Answer
H^+ ions
107. Acidic salts can further react with _________ to form a neutral salt.
(a) Bases
(b) Acids
(c) Salts
(d) None of these
Show Answer
Bases
108. When OH^- ions of a base are _______ neutralized by an acid are called basic salt.
(a) Completely
(b) Average
(c) Partially
(d) None of these
Show Answer
Partially
109. Basic salts are produced by __________.
(a) Monoacid bases
(b) Polyacid bases
(c) Polyprotic acids
(d) None of these
Show Answer
Polyacid bases
110. Double salts are formed by the combination of two ________salts.
(a) Acidic salts
(b) Basic salts
(c) Normal salts
(d) None of these
Show Answer
Normal salts
111. When the mixture of equimolar________ solution of normal salt is crystallized, they produce double salt.
(a) Saturated
(b) Unsaturated
(c) Super saturated
(d) None of these
Show Answer
Saturated
112. Which one is the example of double salt?
(a) Sodium hydroxide
(b) Mohr’s salt
(c) Potash alum
(d) Both b and c
Show Answer
Both b and c
113. Which salt is necessary for human life?
(a) NaCl
(b) Ferric alum
(c) Potash alum
(d) None of these
Show Answer
NaCl
114. Which is the main component of bones?
(a) Calcium phosphate
(b) Sodium sulphate
(c) Alum
(d) None of these
Show Answer
Calcium phosphate
115. Sodium carbonate is also called__________.
(a) Ash
(b) Washing soda
(c) Baking soda
(d) None of these
Show Answer
Washing soda
116. Sodium carbonate is used as water__________.
(a) Ripener
(b) Hardner
(c) Softner
(d) None of these
Show Answer
Softner
117. Sodium bicarbonate is also called__________.
(a) Baking soda
(b) Washing soda
(c) Alum
(d) None of these
Show Answer
Baking soda
118. Sodium bicarbonate is used as an__________.
(a) Antibasic
(b) Antiacid
(c) Neutral
(d) None of these
Show Answer
Antiacid
119. KNO_3 is used in the manufacture of __________.
(a) Paper
(b) Ceramics
(c) Flint glass
(d) None of these
Show Answer
Flint glas
120. Potash alum is used in the ________ of water.
(a) Purification
(b) Oxidation
(c) Fermentation
(d) None of these
Show Answer
Purification
121. Calcium sulphate is commonly known as __________.
(a) Seat
(b) Gypsum
(c) Kajol
(d) None of these
Show Answer
Gypsum
122. Calcium sulphate is used in __________.
(a) Fertilizer
(b) Plaster of paris
(c) Cement
(d) All of them
Show Answer
All of them
123. Magnesium sulphate is used as an antacid and __________.
(a) Laxative
(b) Antibacterial
(c) Antifungal
(d) None of these
Show Answer
Laxative
124. Copper sulphate is used for copper plating in _________ process.
(a) Ultra sonication
(b) Electroplating
(c) Titration
(d) None of these
Show Answer
Electroplating
125. According to Arrhenius, which of the following is not an acid?
(a) HCl
(b) H_2SO_4
(c) CO_2
(d) HNO_3
Show Answer
CO_2
126. AlCl_3 is an acid according to:
(a) Arrhenius
(b) Lewis
(c) None
(d) None of these
Show Answer
Lewis
127. Which of the following is a Lewis base?
(a) HCl
(b) AlCl_3
(c) BF_3
(d) F^-
Show Answer
F^-
128. Neutral solution has a pH value of ________
(a) 7
(b) 5
(c) 3
(d) 14
Show Answer
7
129. The pOH of 0.001 M solution of nitric acid.
(a) 0.001
(b) 10
(c) 11
(d) 14
Show Answer
11
130. NH_3 is a base according to __________.
(a) Bronsted-Lowery
(b) Lewis
(c) Both a and b
(d) None of these
Show Answer
Both a and b
131. The bases which are soluble in water are called__________.
(a) Alkalis
(b) Amphoteric
(c) Slats
(d) None of these
Show Answer
Alkalis
132. The example of weak acid is:
(a) HNO_3
(b) CH_3COOH
(c) H_2SO_4
(d) None of these
Show Answer
CH_3COOH
133. According to the Arrhenius concept, which of the following is not an acid?
(a) HCl
(b) H_2SO_4
(c) CO_2
(d) HNO_3
Show Answer
CO_2
134. AlCl_3 is an acid according to,
(a) Arrhenius
(b) Lowery and Bronsted
(c) Lewis
(d) All of these
Show Answer
Lewis
135. Which of the following is a Lewis base
(a) HCl
(b) AlCl_3
(c) BF_3
(d) F^-
Show Answer
F^-
136. Neutral solution has a pH value of
(a) 3
(b) 5
(c) 7
(d) 14
Show Answer
7
137. The pOH of 0.001M solution of nitric acid is.
(a) 0.001
(b) 10.0
(c) 11
(d) 14
Show Answer
11
138. When a strong base and weak acid reacts, the only products are ,
(a) Neutral salt and water
(b) Basic salt and water
(c) Acidic salt and water
(d) Acidic, basic salt and water
Show Answer
Basic salt and water
139. NH_3 is a base according to
(a) Arrhenius
(b) Lowery and Bronsted
(c) Lewis
(d) Both b and c
Show Answer
Both b and c
140. Which one of the following is a basic salt
(a) KCl
(b) NaCl
(c) Pb(OH)Cl
(d) KHSO_4
Show Answer
Pb(OH)Cl
141. The bases which are soluble in water are called
(a) Acids
(b) Alkalis
(c) Salts
(d) Amphoteric substances
Show Answer
Alkalis
142. The example of weak acid is
(a) HNO_3
(b) CH_3COOH
(c) HCl
(d) H_2SO_4
Show Answer
CH_3COOH
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