101) Which of the following electromagnetic waves has highest velocity?
A) Violet
B) Green
C) Red
D) All have same velocity
102) Which of the following quantum numbers gives information about orientation of orbital?
A) Principal quantum number
B) Angular momentum quantum number
C) Magnetic quantum number
D) Spin quantum number
103) The electronic configuration of element ‘S’ is
A) 1s2 2s2 2p6 3s2 3p4
B) 1s2 2s2 2p6 3s2 3p3
C) 1s2 2s2 2p6 3s2 3p2
D) 1s2 2s2 2p6 3s2 3p1
Explanation:Element ‘S’ (sulfur) has atomic number 16.
Its electron configuration:
Answer:1s² 2s² 2p⁶ 3s² 3p⁴
104) The maximum number of electrons that can be accommodated in a subshell with angular momentum quantum number 1 is
A) 2n2
B) 2(2l+1)
C) 2
D) (21+1)
Explanation:For angular momentum quantum number l = 1 (i.e. p-subshell), number of orbitals = 
,
Each orbital holds 2 electrons → total = 
Answer:2(2l + 1)
105) Which among the following is a non- metal?
A) Potassium
B) Chlorine
C) Silicon
D) Sodium