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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

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Chemistry Class 10 Chapter No. 10 Notes

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SLO Based Questions

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Chemistry Class 10 Chapter No. 10 SLO Questions

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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

To Download Complete Notes of Chemistry Notes 10 Class, Click on the given link.

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

Chemistry Class 10 MCQs (All Chapters)


Jawad Khan

Jawad Khan

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