ECAT Chemistry Solids Online Test

1. The introduction of Kelvin scale in thermometry is according to

2. The M.P of ice at Kelvin scale is 237K° and B.P of water is 373 K. This is a known fact that the molar volumes of different gases at S.T.P are

3. 4.4 g of CO₂ contains how many liters of CO₂ at STP?

4. Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?

5. Which of the following substance is amorphous in nature?

6. Crystals can be classified into

7. An alkaloid contains 17.28% of nitrogen and its molecular mass is 162. The number of nitrogen atoms present in one molecule of alkaloid is:

8. Mean distance between atoms in the range of

9. Which is distilled first?

10. Amorphous substances possess

11. Under what conditions real gases deviate from ideal behavior

12. Ionic solids are characterized by

13. Repeatable entity of a crystal structure is known as

14. When one of the following statements is wrong for gases?

15. Which of the following is isotropic

16. Wt. of 112 ml of oxygen at STP on liquefaction would be

17. Which of the following equations represents the 2nd ionization energy of Na?

18. At constant temperature, the pressure of an ideal gas is doubled, its density becomes

19. The mass of one mole of electron is

20. What is the pressure of 2 mole of NH₃ at 27°C when its volume is 5 lit in Van der Waals equation? (a = 0.17, b = 0.03711)

21. Which of the following contain maximum number of atoms?

22. The total number of protons in 10 g of calcium carbonate in (N₀ = 6.023 x 10²³)

23. Which of the following does not represent a type of crystal system?

24. Poor conductors of electricity is a characteristic of

25. Which of the following crystal does not possess the cubic closed packed arrangement?

26. Isomorphic substances have

27. A real gas most closely approaches the behavior of an ideal gas at

28. Graphite is a good conductor of electricity due to the presence of ________.

29. The deviation of a gas from ideal behavior is maximum at

30. Consider the physical properties of the gases. Which of the following statements about particles of gasses is incorrect? The particles are

31. Which of the following is an example of body centered cube?

32. Which of the following is a pseudo solid?

33. What is the relative rate of effusion of CO and CO₂?

34. Triple point of water is

35. Super conductors are derived from compounds of

36. Van der Waal’s forces exist in

37. If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of substance will

38. Among solids, the highest melting point is exhibited by

39. 50dm³ of CO is burnt completely according to reaction 2CO + O₂ – 2CO₂ Choose the correct statement

40. For c coordination number of four, anion sits at the center of ________ where corners are occupied by cations

41. The phenomenon in which a single substance exist in two or more crystalline forms is called

42. In a cubic lattice, a unit cell is shared equally by how many unit cells?

43. The top of funnel stem should touch the side of the beaker because

44. A semiconductor of Ge can be made p-type by adding

45. The ratio of most probable velocity to that of average velocity is

46. Two moles of an ideal gas at 1 atm are compressed to 2 atm at 273 K. The enthalpy change for the process is

47. In a crystal a ≠ b ≠ c, a = ϒ = 90° and β ≠ 90°. It is

48. Current strength measure by electrometer by each type of ions in mass spectrometry shows?

49. A solution of 10 mL of M/10 FeSO₄ was titrated with KMnO₄ solution in acidic medium, the amount of KMnO₄ used will be

50. In NaCl type structure, the coordination numbers of cation and anions are

51. The insoluble impurities in the saturated solution are removed by

52. Gooch crucible is used for the filtration of precipitates having

53. Which of the following are more temperature sensitive?

54. Crystalline solids can be identified easily from their

55. Which of the following statements about amorphous solids is incorrect?

56. In case of elements the polymorphism is called

57. The volume occupied by 1.4g of N₂ at S.T.P is

58. Potassium crystallizes with a

59. ‘x’ grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28 g. What is the value of ‘x’ in grams?

60. 100 g of CaCO₃ is treated with 1 liter of 1 NHCl. What would be the weight of CO₂ liberated after the completion of the reaction?

61. Coordination number of Zn and ZnS (Zinc blends) is

62. In which of the following compounds H – bonding is not present?

63. Isomorphic substance have

64. Isotopes differ in

65. Which of the following techniques is a type paper chromatography in which solvent is in a pool at the bottom of the vessel?

66. Glass is a

67. To prepare the medium sized crystal the hot filtrate is cooled

68. Solvent extraction is mostly applied to separate

69. Imagine a man is sitting in a room. The room is closed from all sides, no entry, no exit of any gas. If the room expands suddenly then

70. Which of the following pairs do not form a dative covalent bond to each other?

71. 3.2 g of oxygen (At. Wt. = 16) and 0.2 g of hydrogen (At. Wt. = 1) are placed in a 1.12 L flask at 0°C. The total pressure of the gas mixture will be

72. In diamond, the carbon atoms are arranged in a

73. The body centered cubic arrangement is found in the crystal of

74. Formation of a cation is?

75. Amorphous solids

76. Which of the following statements is (are correct)?

77. The surface formed by the breakage of a crystal is called _________ plane.

78. The increasing vapour caused by heating a liquid is due to

79. In the equation PV = nRT which one cannot be numerically equal to R

80. Number of atoms in 558.5 g of Fe (At. Mass of Fe = 55.85 g mole¯¹) is

81. How many allotropic forms are present in carbon?

82. The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is

83. Ice is ________ crystal

84. The existence of a substance in more than one solid modification is known as

85. Correct order of intermolecular forces

86. Half atmospheric pressure is

87. The number of atoms contained in 11.2 L of SO₂ at S.T.P. are

88. In crystal structure of sodium chloride, the arrangement of Cl ions is

89. Bragg’s law is given by equation

90. The reaction 4NH₃ + 3O₂ → 2N₂ + 6H₂O indicates that

91. Amorphous substance posses

92. Which of the following statements about graphite is not true?

93. Pressure remaining constant at which temperature the volume of a gas will become twice o what it is at 0°C

94. Which of the following metal oxides is anti-ferromagnetic in nature?

95. In which one of the following does the central atom not possess an ‘octet’ in its outer shell?

96. The material possessing superconducting properties is

97. Which of the following has least mass?

98. a ≠ b ≠ c, ∞ ≠ β ≠ r ≠ 90 is representation of

99. What will be the external pressure at which water may boil at 120°C?

100. Gases deviate from ideal behavior at high pressure. Which of the following is correct for non – ideality?

101. The example of hexagonal system is

102. In which process solid phase and vapour phase are directly involved?

103. What is the concentration of nitrate ions, if equal volumes of 0.1 M AgNO₃ and 0.1 M NaCl are mixed together?

104. Hydrogen diffuses six times faster than gas A. The molar mass gas of gas A is

105. Which one is not the partial pressure of oxygen in air

106. The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed in it. The thermometers are represented as A, B and C respectively. On which thermometer the lowest reading will be?

107. When the temperature is raised, the viscosity of the liquid decreases. This is because of

108. Which one of the following pair of atoms is most likely to from an ionic bond?

109. The molar volume of CO₂ is maximum at

110. Crystalline solids can be identified easily by their

111. The crystal structure having face centered cubic arrangement is

112. Which solids are called true solids?

113. The rate of diffusion of a gas is proportional to

114. Which of the following substances is not amorphous?

115. The phenomenon in which a compound exists in two or more crystalline forms is called

116. The weight of one molecule of a compound C₆₀H₁₂₂ is

117. An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of compound is

118. Fluted filter paper is used for

119. The relative atomic mass of chlorine is 35.5. What is the m ass of 2 moles of chlorine gas?

120. When the following reaction equations is properly balanced, the number of moles of O₂ will be
C₃H₈ + O₂ → CO₂ + H₂O

121. The following statements contained in a student’s laboratory report is a conclusion

122. If rate of diffusion of A is 5 times that of B, what will be the density ratio of A and B?

123. Distribution law is employed in which one of the following

124. A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centered. The formula of the compound is

125. Crystal can be classified in to _______ basic crystal habits

126. Air at sea level is dense. This is a practical application of

127. If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂ and helium separately, then which one will be filled first

128. The coordination number 8:8 is found in the arrangement of

129. Which forms metallic crystals?

130. The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals. (R = 2 cal mol¯¹ K¯¹)

131. Solvents of covalent compounds include all but

132. A bottle of copper (II) oxide has been contaminated with some solid, NaCl, How can NaCl be removed from the Copper (II) oxide?

133. The volume in liters of CO₂ liberated at STP when 10 grams of 90% pure limestone is heated completely is

134. How many Cl¯ ions are there around Na⁺ ion in NaCl crystal?

135. A malleable solid is one which can be

136. The total number of lattice arrangements in different crystal system is

137. Which one is not usually used for the crystallization?

138. Which one is not postulated in the kinetic molecular theory among the followings?

139. In forming an ionic bond in potassium fluoride, the potassium ion

140. A solid may be made up of

141. The most efficient solvent extraction method is by using

142. Particles that most effects material properties

143. The molecules of air don’t settle down. The is due to

144. The major binding force of diamond, silicon and quartz is

145. Which is trigonal crystal?

146. At STP, a container has 1 mole of Ar, 2 moles of CO₂, 3 moles of O₂ and 4 moles of N₂, Without changing the total pressure if one mole of O₂ is removed, the partial pressure of O₂

147. Simple molecules or giant macromolecules are examples of

148. The allotropic forms of an element are called

149. The ratio of close packed atoms to tetrahedral holes in cubic close packing is

150. The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behavior is a characteristic of substance forming