ECAT Chemistry S-Block Elements Test Online

1. Alum is not used

2. Which of the following gases burns with a blue flame?

3. Silicon is an important constituent of

4. White lead is

5. The chemical composition of white lead is

6. Chile saltpeter has the chemical formula

7. The most abundant element in III A group in earth crust is?

8. Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)?

9. Sodium metal cannot be stored under

10. Alkali metal hydroxides are stable to heat except

11. Which of the following conceivable structures for CCl₄ will have a zero dipole moment?

12. The element having highest electronegativity among the following is

13. Ordinary window glass is a mixture of

14. Which one is formula of borax?

15. In diaphragm cell, hydrogen is discharged by

16. Mica and bauxite are ores of

17. Red lead is

18. In which of the following elements + 1 oxidation state is more stable than +3

19. Solid CO₂ (dry ice) has a structure just like

20. The elements which belong to group IIIA are called

21. Which one is not an element of III A group?

22. Substance which is found in dried up lakes of Tibet and California is

23. Chile Salt peter is

24. AlCl₃ exist as dimmer because

25. The formula of calcium cyanamide is

26. Gypsum is applied to the soil as a source of

27. Which of the following is different from the other three oxides?

28. Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When carbon dioxide is bubbled through A, it turns cloudy. What is the chemical formula of A?

29. The aqueous solution of potash alum is

30. NaNO₃ decomposes on heating at high temperature to give

31. Which element is present in excess in skeletal material?

32. Which electronic configuration corresponds to an element of group IIIA?

33. Bleaching powder is a compound having a formula

34. Causticisation process is used for the preparation of

35. Which is the formula of Chili Salt Peter?

36. Which one of the following substances conducts electricity by the movement of ions?

37. Born is soil has been considered micronutrient for

38. Which of the following sulphates is not soluble in water?

39. The formula of sodium meta borate is

40. Metals belonging to the same group in the periodic table are

41. The halide which is not hydrolyzed is

42. The process of aluminum extraction is called

43. Which is most abundant alkaline metal in earth crust?

44. Sodium conducts electricity because

45. Plaster of Paris is a hydrate of

46. Chrome yellow has a formula

47. Bleaching action of bleaching powder is due to the liberation of

48. Special features of borate glass is that it is

49. Which of the following is monovalent?

50. Washing soda has formula

51. What is true about physical state of borax?

52. CO2 is gas while SiO2 is solid at room temperature.

53. Which one of the following gives white precipitate with aqueous BaCl₂?

54. Choose the gas among the following which turns line water milky:

55. Sodium reacts with water more vigorously than lithium because

56. Down’s cell is used to prepare

57. Among the following oxides, the one which is most basic is

58. The principle constituent of pyrex glass is

59. A pseudo solid is

60. What is true about solubility of orthoboric acid?

61. Point out one of the following which shows moderate electrical conductivity:

62. Calcium cyananmide on treatment with steam under pressure gives NH₃ and

63. Alkali earth metals have two electrons outermost

64. The purification method of bauxite containing iron oxide as impurity is known as

65. The elements having highest melting point is

66. The chief are of aluminum is

67. Which of the following is most dense?

68. Aluminum oxide is

69. Which is the weakest reducing agent?

70. Which one of the following has the lowest boiling point?

71. The chemical formula of bauxite is

72. Which of the following mineral does not contain Al?

73. The formula of china clay is

74. Portland cement is manufactured by using

75. Which is the most amphoteric?

76. Which metal is protected by a layer of its own oxide?

77. The element having least value of ionization energy among the following elements is

78. Which of the following compounds has the lowest anion to cation size ratio?

79. With the increase in atomic weights, melting points of the alkali metals

80. Galena is an ore of

81. Magnesium keeps on burning in

82. Metallic luster exhibited by Na can be explained by

83. Microcosmic salt is

84. Which of the following properties is not true for an alkali metal?

85. The substance used as a smoke screen in warfare is

86. One of the outstanding features of boron is its ability to form

87. The elements which are very abundant I earth are

88. Choose the compound which decomposes on heating similar to LiNO₃

89. Which one does not belong to alkaline earth metal?

90. Boric acid cannot be used

91. Alkali and alkaline earth metals show increasing trend down the group in

92. The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to

93. Which of the following in rain water is responsible for weathering of rocks?

94. Ammonia may be prepared by heating ammonium chloride with

95. Aluminum can jam radar due to

96. Choose the correct statement

97. The reactivity of the alkali metal sodium with water, is made use of

98. The element having least value of heat of hydration is

99. Which of the following imparts violet colouration to the non-luminous flame of Bunsen burner?

100. The oxides of born and silicon are

101. Which element is used in thermite process due to its reactivity?

102. Leblanc process is employed in the manufacture of

103. Aluminum reacts with caustic soda to form

104. H₃BO₃ is a

105. Alkaline earth metals have higher densities, melting and boiling points than alkali metals because of

106. The metal which is used in thermite process because of its activity is

107. Al is more reactive than Fe but Al is less easily corroded than Fe because

108. Choose the element which does not belong to group II A of the periodic table

109. First ionization potential of alkaline earth metal is greater than alkali metals because

110. Anodizing of Al is said when

111. The common mineral of alkali metal sodium is borax which has formula.

112. A combustible gas is liberated when caustic soda solution is heated with

113. Cesium oxide will be

114. Setting of Plaster of Paris involves

115. Dolomite has the composition

116. Boric acid (H₃BO₃) reacts with NaOH to give a salt.

117. The oxides of beryllium are

118. Which of the following alkali metal hydroxides is the strongest base?

119. The formula of Nitre is

120. Silicon is found in nature in the form of

121. Which of the following is most abundant in the earth’s crust?

122. The order of alkali metals is

123. Which is the chemical formula of zircon?

124. Which is formula of orthoboric acid?

125. Which of the following is a Lewis acid?

126. Which of the following is not a use of silicon?

127. Keeping in view the comparison of alkali metals with alkaline earth metals, the alkali metals have

128. Which of the most basic of the following?

129. BF₃ acts as acid according to the concept of

130. Amongst the metals Be, Mg, Ca and Sr of group 2 of the periodic table, the least ionic chloride would be formed by

131. The wire in the flash bulbs is made up of

132. Which of the following is a component of ruby?

133. Potassium is kept in

134. Graphite is a good conductor of electricity. The reason is that

135. In the manufacture of cement which of the following is used?

136. The alkali metal that reacts with nitrogen directly to form nitride is

137. Which of the following is most abundant alkali metal in combined state in nature?

138. The solubility of aluminum hydroxide in sodium hydroxide solution is due to formation of

139. Setting of cement is an

140. Which one of the following sulphate is not soluble in water?

141. Which compound will show the highest lattice energy?

142. Because of its ability to combine with both oxygen and nitrogen aluminum metal is used

143. Nitrates of which elements give same products

144. Borax is a white crystalline solid and it is

145. Plaster of Paris hardens by

146. Which of the following statements is not true about potash alum?

147. Which halide has highest melting point?

148. The word alkali means

149. Which is the chemical formula of mica?

150. Choose the number of group of periodic table to which alkali metals belong to

151. One of the following does not form oxide on heating

152. When excess of SnCl₂ is added to a solution of HgCl₂, a white precipitate turning to grey is obtained. This grey colour is due to the formation of

153. Main process for the manufacture of Na₃CO₃ is

154. What is true about reactivity of aluminum?

155. Aluminorthermy used for on the spot welding of large iron structure is based upon the fact that