Which of the following sets of quantum numbers represent an impossible arrangement -
n l m s
(A) 3 2 -2 (+)1/2
(B) 4 0 0 (-)1/2
(C) 3 2 -3 (+)1/2
(D) 5 3 0 (-)1/2
Difficulty Level:
How many unpaired electrons are present in Ni2+ cation (atomic number = 28)
(A) 0
(B) 2
(C) 4
(D) 6
Difficulty Level:
Correct set of four quantum numbers for the outermost electron of rubidium (Z=37) is:
(A) 5, 0, 0, 1/2
(B) 5, 1, 0, 1/2
(C) 5, 1, 1, 1/2
(D) 6, 0, 0, 1/2
Difficulty Level:
Difficulty Level:
The quantum numbers of four electrons are given below.
n m s
(1) Electron 1 3 0 0 -1/2
(2) Electron 2 4 0 1 1/2
(3) Electron 3 3 2 0 1/2
(4) Electron 4 3 1 0 -1/2
The correct order of decreasing energy of these electrons is -
(A) Electron 3 > Electron 1 > Electron 4> Electron 2
(B) Electron 4> Electron 2 > Electron 3 > Electron 1
(C) Electron 3 > Electron 2 > Electron 4 > Electron 1
(D) Electron 2 > Electron 4 > Electron 3 > Electron 1
Difficulty Level:
Which type of radiation is not emitted by the electronic structure of atoms:
(A) Ultraviolet light
(B) X-rays
(C) Visible light
(D) y-rays
Difficulty Level:
Of the following transitions in hydrogen atom, the one which gives an absorption line of lowest frequency is
(A) n=1 to n=2
(B) n=3 to n=8
(C) n=2 to n=1
(D) n=8 to n=3
Difficulty Level:
If uncertainty in the position of an electron is zero the uncertainty in its momentum will be
(A) < h/4
(B) > h/4
(C) zero
(D) infinite
Difficulty Level:
The maximum number of atomic orbitals associated with a principal quantum number 5 is
(A)9
(B)12
(C) 16
(D) 25
Difficulty Level:
The de Broglie wavelength of electron of He+ ion is 3.329Å. If the photon emitted upon de-excitation of this He+ ion is made to hit H atom in its ground state so as to liberate electron from it, what will be the de Broglie's wavelength of photoelectron ?
(A) 0.1518 Å
(B) 6.1518 Å
(C) 2.3518 Å
(D) 4.1218 Å
Difficulty Level: