2. Heavy metals got their name because compared to other atoms they have

4. Sullage water is –

6. Chile saltpeter is the common name of:

8. An element of atomic no. 29 belongs to

9. Cement is made hard with

11. Acid rain is caused due to emission of which of the following into the atmosphere ?

14. Persons working in cement plants and lime stone quarries are prone to disease like

16. Cement containing excess amount of lime

17. Which metal is the heaviest in periodic table among the following ?

18. Limestone is a raw material used by which industry?

20. How many electrons can be accommodated in d-orbital?

22. Aluminium salt commonly used to stop bleeding is

23. Chemical name of vinegar is

24. Black lung disease occurs in people working in

25. Two electrons in an orbital are differentiated by which of the following ?

26. How many neutrons are there in ₉₂U²³⁸ atom ?

27. An example of heterocyclic compound is

29. Cement is usually a mixture of :

31. A subshell with l = 2 can take up

32. Commercially, sodium bicarbonate is known as

34. The common name of sodium bicarbonate is

35. The depletion of ozone layer is due to

37. Which of the following is used to denature ethanol ?

38. Asbestos is formed of :

39. What is the atomic number of mercury?

40. Which of the following is secondary air pollutant ?

41. Which one is not a primary greenhouse gases in the Earth’s atmosphere?

42. Who modified Bohr’s theory by introducing elliptical orbits for electron path?

43. Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful

44. When cathode rays strike a target of high atomic weight, they give rise to

46. Bayer’s reagent is

47. Calcium salts used as fertilizer is :

48. Setting of plaster of pairs involves

49. The chemical name of quartz is

50. Chemical composition of cement is

51. Oxygen has (+) oxidation number only in

53. The chemical name of ‘Plaster of Paris’ commonly used for setting broken bones is

54. Heavy metal pollution of water is caused by:

55. Which one of the following was used as a chemical weapon in the first world war ?

57. The chemical substance present in bones and teeth is

58. Which of the following molecules has a bond order of 2.5?

62. Threshold limit value of copper in the atmospheric air is

63. The least preferred technique in the disposal of Municipal Solid Waste is

64. Cement is formed by strongly heating a mixture of

65. Baryllium Sulphate is less soluble in water due to

66. Which of the following is not a precious/semi-precious stone?

69. Which one of the following organic compounds has fruity smell?

70. Bone ash contains

73. The oxidation number of nickel in K₄[Ni(CN)₄] is

76. Which one of the following forms of phosphorus is most reactive?

83. What is the most common salt in sea water ?

85. Which of the following is not a gaseous air pollutant?

86. Taj Mahal is greatly affected due to :

87. Coating of solid waste with impervious material is known as

89. The length of double bond is _______ than single bond.

92. Which amidst the following is not a gem stone ?

94. Sodium bicarbonate is commercially known as

96. High concentration hydrocarbon pollutants in atmospheric air causes

97. Which one of the following elements is used in the manufacture of fertilizers ?

98. The element absorbed both in cation and anion form is

99. The compound that has the least value for octane number is :

100. Sulphur dioxide present in the industrial chimney exhaust causes