Q.1
Number of nodes in a 4d-orbital is
  • a) 0
  • b) 1
  • c)2
  • d)3
Q.2
If m has seven values, the value of azimuthal quantum number should be
  • a) 1
  • b) 2
  • c)3
  • d)4
Q.3
Correct expression derived for the energy of an electron in the nth energy level of H-atom is
  • a)
    ch-1_qn-96choice_img_no1.png
  • b)
    ch-1_qn-96choice_img_no2.png
  • c)
    ch-1_qn-96choice_img_no3.png
  • d)
    ch-1_qn-96choice_img_no4.png
Q.4
Which of the following orbitals is not symmetrical about the z-axis?
  • a)pz
  • b) dz2
  • c)s
  • d)dxz
Q.5
How many electrons in an atom can have n=3, l=2, m=-1?
  • a) 2
  • b) 6
  • c)10
  • d)1
Q.6
The magnetic quantum number for the valance electron of Caesium ( at no 55) is
  • a) 3
  • b) 0
  • c)-3
  • d)Any number between -3 to +3
Q.7
Which of the following statement is incorrect regarding probability of fining the electron in px orbital
  • a) It is zero at the nucleus
  • b) It is zero on the Z-axis
  • c) It is same on all sides around the nucleus
  • d) It is maximum on the two opposite sides of the nucleus along X-axis
Q.8
Hund's rule deals with the distribution of electrons in
  • a)a principal shell
  • b) different subshells
  • c)orbitals with slightly different energies
  • d)degenerate orbitals
Q.9
ThE number of nodes in the shape of ns-orbital is equal to
  • a) n
  • b) n+1
  • c)n-1
  • d)n2
Q.10
f the value of azimuthal quantum number of an electron is 2, then which of the following value of magnetic quantum numbers is not permissible
  • a) 0
  • b) 2
  • c)-2
  • d)3
Q.11
The possible subshells in n=3 energy shell are
  • a) s, p, d
  • b) s, p, d, f
  • c) s, p
  • d) s only
Q.12
The d-orbital whose four lobes lie along the axis is
  • a)dz2
  • b) dxy
  • c)dyz
  • d)dx2-y2
Q.13
If the quantum number for the 5th electron in carbon atoms are 2,1,1, +1/2 then for 6th electron, these values would be
  • a) 2,1,0,-1/2
  • b) 2,0,1,+1/2
  • c)2,1,1,-1/2
  • d)2,1,-1,+1/2
Q.14
he shape of the orbital with l=1 and m=0 is
  • a) spherical
  • b) dum-bell
  • c)clover leaf
  • d)dough nut
Q.15
The correct set of quantum numbers for the unpaired electron of Cl atom is
  • a) 2, 0, 0, +1/2
  • b) 2, 1, -1, +1/2
  • c) 3, 1, 1, ±1/2
  • d) 3, 0, 0, ±1/2
Q.16
in Aufbau principle, the word 'Aufbau'
  • a)represents the name of scientist who developed the principle
  • b) is a german word which means "building up"
  • c)is related to the energy of electron
  • d)is related to angular momentum of the electron
Q.17
In an atomic orbital, the sign of lobes indicates the
  • a) sign of the probability distribution
  • b) sign of charge
  • c)sign of wave function
  • d)presence or absence of electron
Q.18
Which shell would be the first to have g-subshell
  • a) 4th
  • b) 5th
  • c)6th
  • d)7th
Q.19
The ( n+l) value of 3d energy level is
  • a) 5
  • b) 4
  • c) 3
  • d) 2
Q.20
An orbit with l=0 is symmetric about the
  • a)x-axis only
  • b) y-axis only
  • c)z-axis only
  • d)nucleus
Q.21
Which of the following orbital does not make sense?
  • a) 3d
  • b) 3f
  • c)5p
  • d)7s
Q.22
or given principal level n=4 the energies of its sub-shells are in the order
  • a) s
  • b)s
  • c)d
  • d)s
Q.23
Which of the following orbital does not exists
  • a) dx2- y2
  • b) dx2- z2
  • c) dxz
  • d) dxy
Q.24
In which of the following electron distribution in ground state, only Hund's rule is violated
  • a)
    ch-1_qn-117choice_img_no1.png
  • b)
    ch-1_qn-117choice_img_no2.png
  • c)
    ch-1_qn-117choice_img_no3.png
  • d)
    ch-1_qn-117choice_img_no4.png
Q.25
Which of the following orbitals has appearance like a baby soother?
  • a) dxy
  • b) dyz
  • c)dx2-y2
  • d)dz2
Q.26
How many electrons can have n=4 and l=2
  • a) 6
  • b) 10
  • c)18
  • d)32
Q.27
In which of the following case, the degeneracy of orbitals does not exist?
  • a) s-subshell
  • b) p-subshell
  • c) d-subshell
  • d) f-subshell
Q.28
Number of unpaired electrons in chromium ( Z=24) is
  • a)4
  • b) 3
  • c)6
  • d)5
Q.29
Which of the following statement is incorrect?
  • a) Probabilities are found by solving Schrodinger wave equation
  • b) Energy of the electron at infinite distance is zero and yet it is maximum
  • c)Some spectral lines of an element may have the same wave number
  • d)The position and momentum of a rolling ball can be measured accurately
Q.30
iven the set of possible quantum numbers that describes the highest energy electron in neon when the atom is in its first excited state.
  • a)n=2, l=1, l=-1, s=1/2
  • b) n=3, l=1, l=-1, s=1/2
  • c) n=3, l=0, l=0, s=1/2
  • d)n=3, l=1, l=0, s=1/2
Q.31
Which of the following arrangement of electrons is most likely to be stable
  • a)
    ch-1_qn-128choice_img_no1.png
  • b)
    ch-1_qn-128choice_img_no2.png
  • c)
    ch-1_qn-128choice_img_no3.png
  • d)
    ch-1_qn-128choice_img_no4.png
Q.32
Electronic configuration of hydride ion is
  • a)1s1
  • b) 1s1 2s1
  • c)1s2
  • d)1s0
Q.33
Which of the following statement relating to the spectrum of hydrogen atom is false
  • a) the lines can be defined by quantum number
  • b) the line of shortest wavelength in blamer series corresponds to n=3 and n=2 levels
  • c)The spectral lines are closer together at long wavelengths
  • d)A continuum occurs at n=∞
Q.34
he number of unpaired electrons in Cu+ is (z=29)
  • a)1
  • b)2
  • c)0
  • d)3
Q.35
Which of the following statement is correct?
  • a) An orbital containing an electron having quantum numbers n=2, l=0, s=+1/2 is spherical
  • b) All photons have same energy
  • c) The frequency of X-rays is less than radio waves
  • d) As intensity of light increases, the frequency increases
Q.36
The set of quantum numbers for the 19th electron in chromium is
  • a)n=4, l=0, m=0, s=+1/2 or -1/2
  • b) n=3 , l=2, m=1, s=+1/2 or -1/2
  • c)n=3, l=2, m=-1, s=+1/2 or -1/2
  • d)n=4 , l=1, m=0, s=+1/2 or -1/2
Q.37
Which of the following species is diamagnetic
  • a) Ti2+ ( Z=22)
  • b)Zn1+ (Z=30)
  • c)Ni1+ (Z=28)
  • d)Cr3+ (Z=24)
Q.38
hich out of following configuration is incorrect
  • a) 1s2, 2s2, 2px2, 2py2,2pz0
  • b)1s2, 2s2, 2px2, 2py1
  • c)1s2, 2s2, 2px1, 2px1,2py1, 2pz1
  • d)1s2, 2s2,2p6,3s2, 3p6, 3d5, 4s1
Q.39
A mass spectrograph is an instrument which is capable of differentiating and identifying particles
  • a) of different masses
  • b) of different charges
  • c) of +ve and -ve charge respectively
  • d) of different e/m ratios
Q.40
The electron configuration of a dipositive ion M2+is 2, 8, 14 and its mass number isthe number of neurons present is
  • a)32
  • b) 42
  • c)30
  • d)34
Q.41
The ion/molecule that is iso electronic with CO is
  • a) CN-
  • b) O22-
  • c)N2+
  • d)O2
Q.42
The number of electron having m=-1 in phosphorus atom is
  • a) 3
  • b) 4
  • c)6
  • d)9
Q.43
A neutral atom of element has 2K, 8L, 11M and 2 N electrons. the total number of s-electrons in the atom is
  • a) 8
  • b) 2
  • c) 16
  • d) 11
Q.44
In which of the following all the electrons are paired
  • a)atom with atomic number 22
  • b) nitride ion
  • c)atom with configuration 3s2 3p4
  • d)in all
Q.45
The number of half filled orbitals in Fe3+ ion ( atomic number of Fe=26) is
  • a) 3
  • b) 4
  • c)5
  • d)6
Q.46
In the energy level sequence for multi-electron atom, 4f-orbital lies between
  • a) 6s and 5d
  • b) 5p and 5d
  • c)4p and 5p
  • d)5d and 6d
Q.47
The correct electronic configuration of Fe3+ ion is Z=26
  • a) [Ar]3d6
  • b) [Ar]3d5
  • c) [Ar]3d4
  • d) [Ar]3d6, 4s2
Q.48
The correct electron configuration for Ni2+ is (Z=28)
  • a)[Ar]4s23d6
  • b) [Ar]4s2 3d6
  • c)[Ar]3d8
  • d)[Ar]4s23d10
Q.49
Which of the following is wrong?
  • a) cathode rays have constant e/m ratio
  • b) e/m ratio of anode rays is not constant
  • c)e/m ratio of protons is not constant
  • d)e/m ratio of β particles is constant
Q.50
6Kr has the electron configuration as [Ar] 4s2 3d10 4pthe next 37th electron will go into the subshell
  • a) 4d
  • b) 4f
  • c)5s
  • d)6s
0 h : 0 m : 1 s