2. Maximum permissible concentration of total hardness in drinking water is

3. Which one is a soluble salt in H₂O?

4. The most pure form of Carbon among the options is

7. Saline soil contains

11. Which is known as carbolic acid?

13. The common name for the compound having formal NaOH is

16. Litmus is obtained from

17. Sweat contains water and ________

18. Hardness of the water is commonly measured in terms of

19. Which one of the following is a micro-element ?

21. 24 carat of diamond is equal to

22. Sodium Carbonate is commonly known as

23. Rock salt is a mineral containing

24. Muscle fatigue is caused by the accumulation of :

25. Which one of the following acids is used in battery ?

26. Which one of the following is used as preservative for foodstuff ?

28. The acid used in lead storage cells is

30. When water itself combines chemically with some element or mineral it is called

31. Which of the following acids serves as an electrolyte in a lead storage battery?

33. Drinking soda is

36. Which of the following acts as promoter for iron in Haber’s process?

37. The chemical name of baking soda is

40. Brine refers to :

42. Chemical name of bleaching powder is :

44. Which of these acids is not organic in origin?

46. The pH of lemon juice is expected to be

47. Surface water is a better source of drinking water because it is poor in

48. Iron and manganese present as pollutants in water cannot be removed by________

50. In sugar solution,

52. Sour taste of lemon is due to the presence of which of the following ?

53. Why is water not suitable for putting out a petrol fire ?

54. Antacids are found in drugs that give relief to

56. Chemical name of common salt is

58. Magnetite is

59. The metallic constituents of hard water are :

60. The unit to measure the flow of water is

61. Basicity of boric acid, H₃BO₃ is

62. The amount of chlorine available in water after disinfection is called as

64. pH scale ranges from

65. The acid which fails to liberate carbon dioxide from sodium bicarbonate is :

68. What is the chemical name for ‘Baking Soda’ ?

69. Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water.

72. Which of the following has pH value 7?

73. Magnalium is an alloy of

74. The chemical formula of the laughing gas is

76. Normal rainwater has a pH level of

77. Ammonial is a mixture of

78. The substance most commonly used as a food preservative is

79. Nitrogen forms a variety of compounds in all oxidation states ranging from

84. What is the covalency of nitrogen in ammonia molecule

85. Which of the following is used in making smoke bombs?

86. The compound used in prickly heat powder to prevent excessive sweating is

87. Sour taste of ‘Coca Cola’ is due to the presence of

91. Philosopher’s wool is chemically

92. A fertile soil is likely to have a pH of

93. Which of the following is the strongest base in aqueous solution ?

94. The chemical name of ‘Common salt’ is

96. A pungent smell often present near the urinals is due to

97. The water pollution in river is measured by the dissolved amount of

98. Maximum permissible concentration of copper in drinking water in mg/L is

100. Which one of the following is most acidic?