MCQs will be asked in the Term-I examination 2021 so here you are provided with MCQ questions for Class 10 Science Chemistry Chapter 2 Acids, Bases and Salts. According to the new CBSE syllabus for Academic session 2021-22, examinations will be conducted in two terms – Term I and Term II.
Here most important MCQs have been
provided so you can do better in your coming examination.
MCQ Questions for Class 10 Science Chemistry Chapter 2 Acids, Bases and Salts
All MCQ Questions for Class 10 Science
Chemistry Chapter 2 have been prepared according to the new pattern of 10 Board
Examinations and completely based on NCERT Science book of class 10.
Correct answers with Explanation are also
given so that you can better understand the basic concept of questions.
For detailed and thorough study you can
also check NCERT Solution of Class 10 Science Chapter 2 Acids, Bases and Salts.
The students can download MCQ Questions
for Class 10 Science Chemistry Chapter 2 in PDF format from the link given
below.
Chapter 2 -Acids, Bases and Salts
Multiple Choice
Questions for I term Exams 2021-22
Choose
correct answers to the following questions-
1. The lowest value of pH is given by
(a) 1M HCI
(b)0.001 M H2SO4
(c) 1M NaOH
(d)0.001 M NaOH
Correct answer- (a)
Explanation – when the concentration of H+ ions increases, the acidic nature also increases but the PH value decreases so 1M HCl has the lowest PH value.
2. PH of water is
(a) 7
(b)>7
(c) <7
(d)14
Correct answer- (a)
Explanation – water is neutral in nature and according to PH Scale it has a PH value is 7.
3. pH of an acid is
(a) 7
(b)>7
(c) <7
(d)14
Correct answer- (c)
Explanation – PH value of an acid is below 7 on the basis of the PH scale.
4. pH of a substance is a
(a) log [H+]
(b)- log [H+]
(c) log [OH-]
(d)- log [OH-]
Correct answer- (b)
Explanation – Formula to find PH value is PH = -lig[H+].
5. In a neutral solution pH is equal to
(a) zero
(b)greater than 7
(c) 14
(d)7
Correct answer- (d)
6. H+ion concentration of a solution is 10-4, its pH
(a) 4
(b)- 4
(c) -10
(d)10
Correct answer- (a)
7. Highest PH (14) is given by
(a) 1 M HCI
(b)0.5 M H2SO4
(c) 0.005 M HCI
(d)1M NaOH
Correct answer- (d)
Explanation – Concentration of hydroxyl ions is maximum in 1MNaOH so it has the highest PH value.
8. pH of a base is
(a) 7
(b)>7
(c) <7
(d)14
Correct answer- (b)
Explanation – A base has a PH value higher than 7.
9. POH of a solution is 9, its pH is
(a) 5
(b)2
(c) 9
(d)14
Correct answer- (a)
10.In a basic solution, colour of phenolphthalein is
(a) purple
(b)pink
(c) red
(d)yellow
Correct answer- (b)
11.Acids
(a) produce H+ in an aqueous solution
(b)neutralise base
(c) mostly produce hydrogen with metals
(d)all the above
Correct answer- (d)
12.Weak acid is
(a) acetic acid
(b)hydrochloric acid
(c) nitric acid
(d)sulphuric acid
Correct answer- (a)
Explanation – Acetic acid produces
fewer hydrogen ions in solution so it is a weak acid.
13.Diprotic acid
is
(a) acetic acid
(b)hydrochloric acid
(c)nitric acid
(d)sulphuric acid
Correct answer- (d)
14.In pickling, vinegar acts as
(a) an oxidant
(b)disinfectant
(c) preservative
(d)all the above
Correct answer- (c)
15.Vinegar contains
(a) acetic acid
(b)lactic acid
(c) citric acid
(d)tartaric acid
Correct answer- (a)
16.Lemon juice contains
(a) acetic acid
(b)lactic acid
(c) citric acid
(d)tartaric acid
Correct answer- (c)
17.Curds contain
(a) acetic acid
(b)citric acid
(c) lactic acid
(d)tartaric acid
Correct answer- (c)
18.When zinc granules are added to dilute sulphuric acid, the gas
produced is
(a) Hydrogen
(b) oxygen
(c) carbondioxide
(d)all the above
Correct answer- (a)
Explanation – When metals reacts
with an acid, they produce Hydrogen gas.
19.Sum of pH and POH is
(a) 7
(b)10
(c) 9
(d)14
Correct answer- (d)
20.Colour of a neutral litmus solution is
(a) purple
(b)blue
(c) red
(d)yellow
Correct answer- (a)
21.Tamarind contains
(a) acetic acid
(b)lactic acid
(c) citric acid
(d)tartaric acid
Correct answer- (d)
22.In an acidic solution, colour of litmus is
(a) purple
(b)blue
(c) red
(d)yellow
Correct answer- (c)
23.In a basic solution, colour of litmus is
(a) purple
(b)yellow
(c) red
(d)blue
Correct answer- (d)
24.In a basic solution, colour of methyl orange is
(a) purple
(b)pink
(c) red
(d)yellow
Correct answer- (d)
25.When washing soda is reacted with dilute hydrochloric acid, the
gas produced is
(a) hydrogen
(b)oxygen
(c) carbon dioxide
(d)all the above
Correct answer- (c)
26.Carbon dioxide is produced when dilute acids react with
(a) chalk
(b)limestone
(c) marble
(d)all the above
Correct answer- (d)
27.Common name of Na2CO3 is
(a) bleaching powder
(b)baking soda
(c) plaster of Paris
(d)washing soda
Correct answer- (d)
28.Common name of (CaSO4)2. H2O is
(a) bleaching powder
(b)baking soda
(c) plaster of Paris
(d)washing soda
Correct answer- (c)
29.Common name of CaOCI2 is
(a) bleaching powder
(b)baking soda
(c) plaster of Paris
(d)washing soda
Correct answer- (a)
30.To maintain joints fixed after fracture, the compound used is
(a)CaOCI2
(b)CaCO3
(c) (CaSO4)2.H2O
(d)Ca (OH)2
Correct answer- (c)
31.For bleaching paper and clothes, the compound used is
(a) CaOCI2
(b)CaCO3
(c) (CaSO4)2.H2O
(d)Ca (OH)2
Correct answer- (a)
Explanation – Chemical formula of
bleaching powder is CaOCl2.
32.For white-washing, the compound used is
(a) CaOCI2
(b)CaCO3
(c) (CaSO4)2.H2O
(d)Ca(OH)2
Correct answer- (d)
Explanation – For white-washing
slaked lime is used and the formula of slaked lime is Ca(OH)2
33.Gypsum is
(a) CaSO4. ½ H2O
(b)CaSO2 . 2H2O
(c) CaSO4 . 3H2O
(d)CaSO4
Correct answer- (b)
34.Common name of NaHCO3 is
(a) bleaching powder
(b) baking soda
(c) plaster of Paris
(d)washing soda
Correct answer- (b)
35.Chlor-alkali process is used in the preparation of
(a) bleaching powder
(b)chlorine
(c) sodium hydroxide
(d)ammonia
Correct answer- (c)
36.Clouds of sulphuric acid are present in the atmosphere of
(a) earth
(b)mars
(c) venus
(d)moon
Correct answer- (c)
37.Washing soda is used in the manufacture of
(a) soap
(b)glass
(c) paper
(d)all the above
Correct answer- (d)
38.Statement true for acids is
(a) sour and turn red litmus to blue
(b)bitter and turn red litmus to blue
(c) sour and turn blue
litmus to red
(d)bitter and turn blue litmus to red
Correct answer- (c)
39.The substance acidic in nature is
(a) antacid
(b)lime juice
(c) lime water
(d)human blood
Correct answer- (b)
40.When a small amount of acid is added to water, the phenomena
occur, are
(i) neutralisation
(ii)ionisation
(iii) salt formation
(iv)dilution
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
Correct answer- (c)
41.When a solution of acid is mixed with a solution of base
(i)the temperature of
solution decreases
(ii)the temperature of solution increases
(iii) salt formation takes place
(iv) the temperature of the solution remains the same
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
Correct answer- (b)
42.Which of the following will not produce carbon dioxide with dil.
HCI
(a) limestone
(b)marble
(c) baking soda
(d)lime
Correct answer- (d)
43.Which of the following is not a mineral acid
(a) nitric acid
(b)sulphuric acid
(c) citric acid
(d)hydrochloric acid
Correct answer- (c)
Explanation – Citric acid is found
in fruits and vegetables. It is not a mineral acid.
44.Which of the following is not a base
(a) C2H5OH
(b)NaOH
(c) KOH
(d)Ca(OH)2
Correct answer- (a)
45.An aqueous solution turns red litmus blue, Addition of which of
the following solution will reverse the reaction
(a) antacid
(b) hydrochloric acid
(c) baking powder
(d)lime water
Correct answer- (b)
46.Equal volumes of hydrochloric acid and sodium hydroxide
solutions of same concentration are mixed, the pH of resulting solution will be
(a) zero
(b)6
(c) 5
(d)7
Correct answer- (d)
Explanation – Equal amount of an
acid and a base of same concentration are mixed, they neutralize each other so
PH of the resulting solution will be 7.
47.In slaking of lime, lime reacts vigorously with water to form
lime water by liberation of heat. Which statement (s) is/are true about the
reaction.
(i)it is an
exothermic reaction
(ii)it is an
endothermic reaction
(iii)the pH of resulting
solution is >7
(iv)the pH of
resulting solution is <7
(a) (ii) and (iii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
Correct answer- (b)
48.Dilute aqueous solution of hydrochloric acid contains
(a) H2O+
and OH-
(b) CI- and OH-
(c) H3O+
and CI-
(d)unionised HCl
Correct answer- (c)
49.The acid used to dissolve gold, is
(a) Aqua regia
(b) Hydrochloric acid
(c) Nitric acid
(d)Sulphuric acid
Correct answer- (a)
50.The correct statement about an aqueous solution of an acid or a
base is
(i)Lower the pH,
stronger the acid
(ii)Higher the pH, stronger the acid
(iii)Higher the pH,
stronger the base
(iv)Higher the pH, weaker the base
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)
Correct answer- (b)
51.The salt having no water of crystallisation is
(a) washing powder
(b)baking soda
(c) blue vitriol
(d)gypsum
Correct answer- (b)
52.Sodium carbonate is basic salt because it is a salt of
(a) strong acid and
strong base
(b)strong acid and weak base
(c) weak acid and strong base
(d)weak acid and weak base
Correct answer- (c)
53.Ammonium chloride is acidic salt because it is a salt of
(a) strong acid and
strong base
(b) weak acid and weak base
(c) weak acid and strong base
(d) strong acid and weak base
Correct answer- (d)
54.Sodium hydrogen carbonate is one of the constituents of baking
power. Its other component is ?
(a) acetic acid
(b)hydrochloric acid
(c) carbonic acid
(d)tartaric acid
Correct answer- (d)
55.To prevent tooth decay, we use tooth paste. The nature of tooth
paste is
(a) acidic
(b)basic
(c) neutral
(d)none of the above
Correct answer- (b)
Class 10 science chapter 2 fill in the blanks
Here you are provided with Important fill in the blanks of Class 10 Science Chapter 2which are also very useful in the context of new pattern of CBSE Class Board Exams 2021-22. You can prepare Multiple Choice Questions using the following fill in the blanks yourself.
Acids, Bases and Salts fill in the blanks
1. The colour of litmus solution in the presence of an acid, is .....................
2. In
stomach digestion of food takes place in ................................
medium.
3. Vinegar
is used as ................................ for food.
4. Curd
should not be stored in brass vessels because it contains
................................ acid.
5. Acetic
acid is present in ................................ while
................................ is present in lemon.
6. Litmus
solution is a
................................ dye.
7. The
substances which change the colour of red litmus to blue, are ................................
8. Litmus
is an ................................ indicator.
9. Reactive
metals produce ................................ gas with acids.
10. Mg + 2HCI → ........+ H2.
11. ......................can dissolve gold and platinum.
12. Curds should not be
stored in copper and ................................ vessels.
13. Copper vessels are coated
with a layer of tin to prevent the action of ............................
present in foods with the metal surface.
14. Methyl orange and
..................... are synthetic indicators.
15. All acids have
............................ in common.
16. Acids produce
............................ ions if aqueous solution.
17. Carbonic acid is
............................ and weak acid.
18. Aqueous acidic solution
conducts electricity due to the formation of ............................ ions.
19. More active metal
replaces less active ............................
20. By neutralization of
acids ............................ are formed.
21. Chlorine and
............................ gases are formed as byproduct in the electrolysis
of sodium chloride solution.
22. Gypsum on heating at 373
K produces ............................
23. Calcium sulphate
hemihydrates is ............................
24. Sodium hydrogen carbonate
is called ............................
25. Hydrofluoric acid is used
in ............................ of glasswares.
26. The atmosphere of Venus
is made up of thick clouds of ............................ acid.
27. Carbonates produce
............................ reacting with acids.
28. Rock salt is
............................ like coal.
29. On dilution pH of an
acidic solution ............................
30. Aqueous solution of
glucose do not conduct ............................
31. Chemical formula of
washing soda is ............................
32. ..........................
is used in the manufacture of glass, soap and paper industry.
33. PH of a
............................ solutions is 7.
34. Mixing of acid in water
is an ............................ reaction.
35. PH of 0.1 mol
of H+ concentration is
............................
36. Our body works within the
pH range of ...................to 7.8.
37. When pH of rain water is
lesser than ............................ it is called acid rain.
38. .........................
acids are not completely ionised.
39. Methyl orange turns
................................ in acidic solution.
40. Phenolphthalein is ................................ in acidic solution.
I hope this article is very helpful and you can secure good marks in your Board exams. You can download Pdf free and to better understand you can watch videos on the same topic on the YouTube channel.
- Chapter 2 Acids, Bases, and Salts
- Chapter 3 Metals and Non-metals
- MCQ Questions for Class 10 Science Chemistry Chapter 2
- Acids.Bases and Salts Extra Questions
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