Telangana SSC Physical Sciences

II. Match the following.

Group – A Group – B

71. Alkali metal family ( ) A) 13 (III A) group
72. Boron family ( ) B) 14 (IV A) group
73. Halogen family ( ) C) 15 (V A) group
74. Carbon family ( ) D) 17 (VII A) group
75. Nitrogen family ( ) E) 1 (I A) group

Group – A Group – B

76. Law of triads ( ) A) Newlands
77. Periodic law – at. wt. ( ) B) Moseley
78. Periodic law – at. no. ( ) C) Electronic configuration
79. Modern periodic law ( ) D) Dobereiner
80. Law of octaves ( ) E) Mendeleev

Also See Previous Questions

Fill in the blanks:

81. Lithium, ………. and Potassium constitute a Dobereiner’s triad.
82. ……….. was the basis of the classifications proposed by Dobereiner, Newlands and Mendeleev.
83. Noble gases belongs to ……… group of periodic table.
84. The incomplete period of the periodic table is ………..
85. The element at the bottom of a group would be expected to show ………. metallic character than the element at the top.
86. ……… proposed the law of octaves.
87. Newlands periodic table was restricted to only ………….
88. Mendeleev’s periodic law states that the physical and chemical properties of the elements are a periodic function of their ……….
89. There are ……….. vertical columns in Mendeleev’s periodic table called ………..
90. Sub group I A elements are called ……….
91. The horizontal rows in Mendeleev’s periodic table are called ……….
92. Eka-boron is later discovered as ………
93. Eka-aluminium is later identified as ………
94. Eka-silicon is discovered as ……….
95. The melting point of Gallium is ………
96. Atomic weight = Equivalent weight × ………..
97. 101th element was named as ……….
98. ………… realised that the atomic number is more fundamental characteristic of an element than its atomic weight.
99. Modern periodic law states ‘the physical and chemical properties of elements are periodic function of the …….. of their atoms’.
100. Group of elements is also called ……….

Answers:

71-E; 72-A; 73-D; 74-B; 75-C
76-D; 77-E; 78-B; 79-C; 80-A

81) sodium 82) Atomic weight
83) ‘O’ group (18th group) 84) 7th period
85) High 86) Newlands
87) 56 elements 88) atomic weight
89) eight, groups 90) alkali metals
91) periods 92) scandium
93) gallium 94) germanium
95) 32°C 96) valency
97) Mendelevium 98) Moseley
99) electronic configuration 100) element family (or) chemical family

61. As most of the elements in group 17 (VII A) are obtained from nature as sea salt, they are called as
A) alkali metal family B) chalcogen family
C) halogen Family D) noble gases

62. Actinoids are from …………. to …………..
A) 90Th to 103Lr B) 58Ce to 71Lu
C) 37Rb to 54Xe D) 31Ga to 36Kr

63. Group I (I A) from Li to Fr with outer shell electronic configuration ns1 is called
A) Boron family B) Alkali metal family
C) Oxygen family D) Nitrogen family

64. Group 14 (IV A) family is called
A) Oxygen family B) Nitrogen family
C) Carbon family D) Boron family

65. Valency of Calcium is
A) 1 B) 2 C) 3 D) 4

66. Valency of Chlorine is
A) 8 B) 7 C) 2 D) 1

67. Electronic configuration of valence shell of any two elements in a given period
is ………….
A) same B) constant C) not same D) none

68. The number of positive charges (protons) in the atom of an element is called the …………. of the element.
A) atomic weight B) atomic strength C) atomic number D) atomic mass

69. …………. block of elements contains metals, non-metals and metalloids also.
A) s B) p C) f D) d

70. Electron affinity of Fluorine is
A) -295 kJ mol-1 B) -349 kJ mol-1 C) -200 kJ mol-1 D) -328 kJ mol-1

Answers:

51-C; 52-C; 53-D; 54-A; 55-B; 56-C; 57-A; 58-B; 59-A; 60-C; 61-C; 62-A; 63-B; 64-C; 65-B; 66-D; 67-C; 68-C; 69-B; 70-D.