10th class chemistry unit 2 MCQs
chapter 2 MCQs 10th Class Chemistry
Acid bases and Salts:
1. The conjugate acid of base H2 O is:
a. H3O+
b. H+
c. O-2
d. H2
2. The meaning of Latin word “acidus” is:
a. Salty
b. Sweet
c. Sour
d. Tasteless
3. ……… is not mineral acid:
a. H2SO4
b. HCl
c. NaOH
d. CH3COOH
4. Acids reacting with metal sulphides, liberate gas:
a. Hydrogen sulphide
b. Oxygen
c. Hydrogen oxide
d. Hydrogen
5. When bases react with acids, they form salt and:
a. Water
b. Oxygen gas
c. Carbon dioxide
d. Hydrogen gas
6. Which of the following is not an acid?
a. NH3
b. AlCl3
c. H+
d. BF3
7. The natural source of citric acid is:
a. Lemon
b. Rancid butter
c. Sour milk
d. Fats
8. Rancid butter has a foul smell because of:
a. Tartaric acid
b. Butanoic
c. Sulphuric acid
d. Nitric acid
9. According to Arhenius concept, base is a specie which:
a. Which can donate a proton to other specie
b. Gives H+ ion in aqueous solution
c. Which can accept a proton from other specie
d. Gives OH ion in aqueous solution
10. ……… is a lewis base:
a. BF3
b. AlCl3
c. NH3
d. H+
11. In strong acidic solution the color of litmus becomes:
a. Yellow
b. Red
c. Colorless
d. Blue
12. Uric acid is found in:
a. Apple
b. Urine
c. Grapes
d. Fats
13. Which of the following is used for the preparation of soap?
a. NaOH
b. Pb(NO3)2
c. Fe(OH)2
d. ZnCl2
15. The taste of base is:
a. Sour
b. Bitter
c. Salty
d. Sweet
16. ……… is not an acid:
a. H2CO3
b. HCl
c. H2SO4
d. NH3
17. The acid which is the king of chemicals is:
a. Hydrochloric acid
b. Sulphuric acid
c. Acitic acid
d. Nitric acid
18. Which base is more corrosive?
a. Ca(OH)2
b. NH4OH
c. An(OH)3
d. NaOH
19. Arrhenius presented the concept of acid and base in:
a. 1789
b.1 787
c. 1790
d. 1788
20. The conjugate base of HCl acid is:
a. Cl–
b. H+
c. NH+4
d. OH–
21. The conjugate base of H3O+ is:
a. H3O+
b. H2O
c. H3O–
d. OH–
22. The acid used in lead storage batteries as electrolyte is:
a. Formic acid
b. Sulphuric acid
c. Citric acid
d. Uric acid
23. Which acid is used for the preservation of food?
a. Hydrochloric acid
b. Sulphuric acid
c. Benzoic acid
d. Nitric acid
24. The base which is used in alkaline battery:
a. KOH
b. NaOH
c. Mg(OH)2
d. Al(OH)3
25. If KW =[H+][OH–]=1.0×10-14 at 25o C What is the concentration of H+ in pure water at 25o C?
a. 1 x 10-14moldm-3
b. 1 x 10-7moldm-3
c. 1 x 1014moldm-3
d. 1 x 107moldm-3
26. The first acid known to man was:
a. Sulphuric acid
b. Benzoic acid
c. Nitric acid
d. Acetic acid
27. Lactic acid is found in:
a. Grapes
b. Sour milk
c. Lemon
d. Apple
28. Bronsted-Lowry presented the concept of acids and bases in:
a. 1923
b. 1787
c. 1943
d. 1823
29. The acid present in sour milk is:
a. Tartaric acid
b. Lactic acid
c. Uric acid
d. Formic acid
30. Citric acid is found in:
a. Lemon
b. Urine
c. Sour milk
d. Fat
31. The binary compounds of oxygen such as carbon dioxide and sulphur dioxide were named as acids by:
a. Al Jahiz
b. Jabir bin Hayan
c. Hamphry devy
d. Lavisior
32. Word acid came from:
a. Indian
b. Greek
c. Latin
d. Italian
33. Maliac acid is found in:
a. Apple
b. Urine
c. Butter
d. Fat
34. Butyric acid is found in:
a. Grapes
b. Apple
c. Rancid butter
d. Fats
35. Bases on reaction with ammonium salt release:
a. Sulphur dioxide gas
b. Nitrogen gas
c. Ammonia gas
d. Hydrogen gas
36. In strong basic solution the color of litmus turns into:
a. Red
b. Yellow
c. Colorless
d. Blue
37. Which chemical is used for removing grease from clothes?
a. Ammonium hydroxide
b. Ammonium nitrate
c. Aluminium chloride
d. Aluminium hydroxide
38. The formula of citric acid is:
a. C16 H31COOH
b. C14 H31COOH
c. C17 H35COOH
d. C15 H31COOH
39. Which one of the following is lavoisier acid?
a. HCl
b. CO2
c. NH3
d. H2SO4
40. Which base is used to neutralize acidity in the stomach?
a. Mg(OH)2
b. Ca(OH)2
c. KOH
d. NaOH
41. Acid used for flavouring of food is:
a. Sulphuric acid
b. Benzoic acid
c. Nitric acid
d. Acetic acid
42. Which compound is amphoteric?
a. HCl
b. H20
c. CH3 COOH
d. NaCl
43. The pOH of 0.001M solution of KOH is:
a. 2
b. 3
c. 4
d. 11
44. The sum of pH and pOH is always:
a. 7
b. 1
c. 14
d. 0
45. Which is common indicator?
a. pH paper
b. Methyl orange
c. Litmus paper
d. None of the above
46. The sum of pH and pOH at 25o C is always:
a. 10
b. 4
c. 14
d. 8
47. The pH of neutral solution is:
a. 8
b. 6
c. 12
d. 7
48. The pH value of a neutral solution is always:
a. Equal to seven
b. Greater than seven
c. Zero
d. Less than seven
49. Values of pH and pOH are:
a. 1 to 16
b. 1 to 13
c. 0 to 14
d. 0 to 10
50. When alkalies react with ammonium salts which gas is liberated?
a. H2
b. O2
c. NH3
d. CO2
51. Which of the following is an example of complex salt?
a. Potassium ferrocyanids
b. Zinc sulphate
c. Sodium phosphate
d. Potash alum
52. Potassium ferrocyanids K4[Fe(CN6)] is:
a. Complex salt
b. Normal salt
c. Double salt
d. Mixed salt
53. Ca (OCl)Cl is an example of:
a. Normal salt
b. Complex salt
c. Mixed salt
d. Double salt
54. Which of the following is acidic salt?
a. NaCl
b. KHSO4
c. Ca(OCl)Cl
d. Al(OH)2 Cl
55. Salt formed with the reaction of HCl and KOH is:
a. Neutral
b. Acidic
c. Complex
d. Basic
56. Which of the following is not present in mixed salts?
a. K2SO4.Al2(SO4)3
b. K4[Fe(CN6)]
c. NH4NO3.24H2O
d. Ca (OCl)Cl
57. Which of the following is used as fertilizer?
a. Sodium carbonate
b. Gypsum
c. Potassium nitrate
d. Both b and c
58. Bleaching powder is an example of:
a. Double salt
b. Mixed salt
c. Acidic salt
d. None
59. KCl is an example of:
a. Mixed salt
b. Double salt
c. Complex salt
d. Normal salt
60. Which of the following is double salt?
a. AlCl3
b. NaCl
c. K2SO4.Al2(SO4)3
d. CaO
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