Chemistry Class 9th
81. The charge on an electron is
A. -1.602 × 10^19 coulombs
B. 1.602 × 10^11 coulombs
C. 1.602 × 10^15 coulombs
82. Protons is -------times is heavier than electrons
A. 1850
B. 1837
C. 1819
83. The mass of proton is equal to
A. 1.0072766
B. 1.087654
C. 1.0987654
84. The mass of neutron is equal to
A. 1.0086654
B. 1.0072766
C. 1.6022
85. Neutron is_______ times heavier than proton
A. 1842
B. 1879
C. 1860
86. The arrangement of electons in orbits around the nucleus is called
A. Configuration
B. Electronic configuration
C. Both a and b
87. The first shell around a nucleus is called
A. K-shell
B. M-shell
C. L-shell
88. The number of electrons in a particular orbit is given by formula
A. 2n
B. n
C. 2n^2
89. The maximum no, of electrons in first shell is
A. 2
B. 8
C. 18
90. As the shell no. increases , the energy of electrons also
A. Increases
B. Decreases
C. Remains same
91. There are ------ sub-shells
A. 2
B. 3
C. 4
92. The sub-shells are represented by
A. K,L,M,N
B. s,p,d,f
C. Both a and b
93. Sub-shell s stands for
A. Super
B. Small
C. Sharp
94. Sub-shell p stands for
A. Prior
B. Principal
C. Both a and b
95. Sub-shell d stands for
A. Diffused
B. Principal
C. None of these
96. The maximum no, of electrons in 3rd shell is
A. 2
B. 8
C. 18
97. s sub-shell can accommodate maximum of ------- electrons
A. 2
B. 6
C. 10
98. p sub-shell can accommodate maximum of ------- electrons
A. 2
B. 6
C. 10
99. d sub-shell can accommodate maximum of ------- electrons
A. 2
B. 6
C. 10
100. f sub-shell can accommodate maximum of ------- electrons
A. 6
B. 10
C. 14