Chemistry Class 10th English Medium Chapter 15 Water Notes MCQs Questions Bank

chemistry 10th notes Chapter No 15

1. Hardness is of _types:

 
 
 
 

2. Water pollution is contamination of water:

 
 
 
 

3. Gypsum is strongly in water:

 
 
 
 

4. Acute lead poisoning causes dysfunction of:

 
 
 
 

5. The chemicals used to kill or control pests are called pesticides. They are:

 
 
 
 

6. Lack of proper sanitation facilities is the main cause of rapidly spreading diseases:

 
 
 
 

7. Depletion of O₂ from water is not because of:

 
 
 
 

8. Temporary hardness is because of:

 
 
 
 

9. Which of the following property is responsible for dissolving nonionic polar compounds in water?

 
 
 
 

10. Water borne diseases:

 
 
 
 

11. water also present in the atmosphere in form of:

 
 
 
 

12. Which one of the following ions does.not cause hardness in water?

 
 
 
 

13. Drinking hard water causes disorders:

 
 
 
 

14. The maximum density of water is at 4°C:

 
 
 
 

15. Fluorosis is a disease caused by the consumption of excess :

 
 
 
 

16. Specific heat capacity of water is:

 
 
 
 

17. The _salt is present in detergents cause rapid growth of algae in water:

 
 
 
 

18. Which gas is used to destroy harmful bacteria in water?

 
 
 
 

19. Hookworm infects the:

 
 
 
 

20. The consumption of excess fluoride leads to a diseased condition called:

 
 
 
 

21. Water is excellent solvent for: :

 
 
 
 

22. Water dissolves non-ionic compound by:

 
 
 
 

23. Cholera is an acute infection caused by_ bacteria:

 
 
 
 

24. Specific heat capacity of water is:

 
 
 
 

25. Ionic compounds are soluble in water due to:

 
 
 
 

26. Water is a universal solvent because of its:

 
 
 
 

27. HCO₃ makes the water:

 
 
 
 

28. Heavy metals like Cadmium, Lead and Mercury are toric and health hazards for:

 
 
 
 

29. Chlorine kills:

 
 
 
 

30. Which of the following metal is non-toxic?

 
 
 
 

31. It is sodium salt of a long carboxylic acid: 

 
 
 
 

32. Water pollution is unfit for : purposes:

 
 
 
 

33. Use of detergents is increasing day by day for cleaning purposes in: :

 
 
 
 

34. Permanent hardness of water is due to _____ of calcium and magnesium

 
 
 
 

35. The structure of water molecule is

 
 
 
 

36. Temporary hardness of water is because of:

 
 
 
 

37. Neurological damage is caused by the poisoning of:

 
 
 
 

38. _______ is/are liver infection(s) caused by viruses.

 
 
 
 

39. Permanent hardness of water can be removed by:

 
 
 
 

40. Rapid growth of algae in water bodies is because of detergent having

 
 
 
 

41. Sodium zeolite is a naturally occurring resin of:

 
 
 
 

42. Which element does not cause toxicity in water?

 
 
 
 

43. Acute cadmium poisoning causes _______.

 
 
 
 

44. _______ produces good lather with soap.

 
 
 
 

45. MgCO₃ + CO₂ +H₂O 

 
 
 
 

46. only … percent of the total water on the earth is potable :

 
 
 
 

47. The removal of .. and Ca’* ions which are responsible for the hardness is called water softening.

 
 
 
 

48. Dysentery is a disease of:

 
 
 
 

49. Chemical form of gypsum is:

 
 
 
 

50. Which of the following is not soluble in water?

 
 
 
 

51. Soft water is that which produces _lather with soap:

 
 
 
 

52. In some parts of the world, the water supply contains small amount of _ compounds:

 
 
 
 

53. Which one of the following diseases causes severe diarrhea and can be fatal?

 
 
 
 

54. pure water has __conductivity:

 
 
 
 

55. Water is a universal:

 
 
 
 

56. Which of the following disease cause liver inflammation?

 
 
 
 

57. CaCO₂ + CO₂ + H₂O —→ :.

 
 
 
 

58. One water molecule can form hydrogen bonding with _____ other water molecules

 
 
 
 

59. Temporary hardness is removed by adding: .

 
 
 
 

60. Which of the following water borne disease is not caused by bacteria?

 
 
 
 

61. Sea water is unfit for purposes:

 
 
 
 

62. Water has surface tension:

 
 
 
 

63. Water pollution causes rapid growth of:

 
 
 
 

64. Which of the following salt makes the water permanently hard?

 
 
 
 

65. Hard water can cause:

 
 
 
 

66. Hepatitis and can be transmitted by contaminated water:

 
 
 
 

67. Which one of the following salts makes the water permanently hard?

 
 
 
 

68. The freezing point of water is:

 
 
 
 

69. Hard water contains salts of

 
 
 
 

70. Temporary hardness is because of presences of bicarbonates of _ _ and magnesium.

 
 
 
 

71. Water molecule has structure:

 
 
 
 

72. The disease that causes bones and teeth damage is:

 
 
 
 

73. Swimming pools are cleaned by:

 
 
 
 

74. Hard water consumes large amount of ___ __ in washing purposes:

 
 
 
 

75. Patient feels weakness and fatigue in:

 
 
 
 

76. Aquatic animals feel suffocation and ultimately die due to insufficient supply of:

 
 
 
 

77. A large number of soap is wasted in formation:

 
 
 
 

78. Diarrhea may be caused by viruses:

 
 
 
 

79. The boiling point of water is – at sea level

 
 
 
 

80. Water is composed of:

 
 
 
 

81. Chemical formula of lime stone is:

 
 
 
 

82. The ocean contains about percent of world water:

 
 
 
 

83. Which one of the following properties of water is responsible for rising of water in plants?

 
 
 
 

84. Detergents can work even in solutions:

 
 
 
 

85. Vibrios cholera may be found in water contaminated by:

 
 
 
 

86. Jaundice is caused by an excess of in blood:

 
 
 
 

87. Hydroxyl group (OH) is not present in

 
 
 
 

88. Which one of the following diseases causes liver inflammation?

 
 
 
 

89. Human body consists of __ percent water:

 
 
 
 

90. Permanent hardness is removed by adding:

 
 
 
 

91. Typhoid is a dangerous _disease:

 
 
 
 

92. Which of these is not a symptom of jaundice?

 
 
 
 

93. Good quality Water is colorless and:

 
 
 
 

94. Fertilizers are used to make up deficiency of:

 
 
 
 

95. Which one of the following gases is used to destroy harmful bacteria in water?

 
 
 
 

96. Mg²⁺ and Ca+2 ions react with soap to form calcium and magnesium salts of fatty acids called:

 
 
 
 

97. Industrial effluents consist of:

 
 
 
 

98. The removal of ______ ions causes water softening.

 
 
 
 

99. Water pollution due to agriculture waste is because of use of the:

 
 
 
 

100. Used water is called:

 
 
 
 

101. An excess of bile pigment in the blood is a symptom of _______ disease

 
 
 
 

102. Hookworm infects about. billion people worldwide per annum:

 
 
 
 

103. Permanent hardness can only be removed by using:

 
 
 
 

104. Which of the following ion does not cause hardness in water?   

 
 
 
 

105. Permanent hardness because of Mg²⁺ and Ca₂:

 
 
 
 

106. A disease that causes bone and tooth damage:

 
 
 
 

Short Questions

1. Complete and balance the following equation: Mg(HCO₃)₂+Ca(OH)₂→
2. Define soap. How can hard water reduce efficiency of soap?
3. Define water borne diseases.
4. Describe chlorination of water. Give its importance.
5. Describe the difference between temporary and permanent hardness of water.
6. Differentiate between soft and hard water.
7. Explain the chemistry of removing the temporary hardness by boiling water.
8. Explain why non-ionic polar compounds are soluble in water?
9. Give any two disadvantages of hard water.
10. Give composition of water molecule.
11. How can waterborne diseases be prevented?
12. How decaying plants consume oxygen?
13. How do detergents make the water unfit for aquatic life?
14. How do the pesticides cause water pollution?
15. How do the pesticides cause water pollution?
16. How does addition of Na₂CO₃ remove permanent hardness of water?
17. How does limestone dissolve in water?
18. How does sodium zeolite soften water?
19. How does the water used as a cleaning agent in industries causes pollution?
20. How does water dissolve sugar and alcohols?
21. How does water rise in plants?
22. How does water use as a cleaning agent in industries causes pollution?
23. How hardness of water is removed by using washing soda?
24. How is Jaundice caused? Write its symptoms.
25. How is rain water responsible for water hardness?
26. How is temporary hardness removed by Clark’s method?
27. How is typhoid caused?
28. How water borne diseases can be prevented?
29. Mention the causative agent and signs/symptoms of cholera.
30. Mention the disadvantages of detergents.
31. Name the properties of water which make it a universal solvent.
32. Point out two properties of water that make it an excellent solvent.
33. What are effects of temporary hardness in water?
34. What are the causes of hardness in water?
35. What are the disadvantages of detergents?
36. What are the dual effects of agricultural effluents?
37. What are the reasons of waterborne diseases?
38. What are waterborne diseases?
39. What do you mean by boiler scale?
40. What do you mean by boiler scales? How are they removed?
41. What do you mean by fluorosis?
42. What is an industrial waste?
43. What is capillary action?
44. What is dysentery?
45. What is hepatitis?
46. What is industrial effluent?
47. What is meant by fluorosis?
48. What is meant by leaching process?
49. What is the chemistry of removing the temporary hardness by boiling water?
50. What is the difference between biodegradable and non-biodegradable substances?
51. What is the difference between Hepatitis and Jaundice?
52. What is the effect of detergents on scarcity of oxygen?
53. What is the function of fertilizers?
54. What is the importance of unusually high heat capacity of water for our environment?
55. What is the importance of water for existence of life?
56. What is the principle of removing permanent hardness of water?
57. What is water pollution?
58. Which bacteria causes the cholera?
59. Which forces are responsible for dissolving polar substances in water?
60. Which industrial effluents cause water pollution?
61. Which salts are responsible for hardness of water?
62. Which salts are responsible for temporary and permanent hardness of water?
63. Why are non-polar compounds insoluble in water?
64. Why are pesticides used?
65. Why is sea water unfit for drinking purpose?
66. Why is the use of detergents increasing day by day?
67. Why is the water molecule polar?
68. Why is water called a universal solvent? Also state the properties that make it a universal solvent.
69. Why is water considered to be a universal solvent?
70. Write a note on occurrence of water.
71. Write characteristics of pure water.
72. Write the role of hookworm in causing waterborne diseases. 
73. Write two properties of water.

Long Questions

1. Define hard water. Write the causes of hardness of water.
2. Explain extensive hydrogen bonding ability of water.
3. Explain four important water borne diseases. How can we prevent from water borne diseases?
4. Explain industrial effluents
5. Explain the methods of removing permanent hardness of water.
6. Explain the methods of removing temporary hardness of water.
7. Explain water is a universal solvent.
8. Explain water pollution due to industrial waste.
9. How polarity of water plays its role to dissolve the substances.  
10. What are agricultural effluents? What are their dual effects?
11. What are domestic effluents?
12. What is meant by hard water? Write its disadvantages.
13. Write any four properties of water.
14. Write down effects of water pollution.

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