Q.1.
Number of nodes in a 4d-orbital is
-
8%
a) 0
-
42%
b) 1
-
17%
c)2
-
33%
d)3
Q.2.
If m has seven values, the value of azimuthal quantum number should be
-
0%
a) 1
-
10%
b) 2
-
70%
c)3
-
20%
d)4
Q.3.
Correct expression derived for the energy of an electron in the nth energy level of H-atom is
-
22%
a)
-
33%
b)
-
33%
c)
-
11%
d)
Q.4.
Which of the following orbitals is not symmetrical about the z-axis?
-
10%
a)pz
-
30%
b) dz2
-
50%
c)s
-
10%
d)dxz
Q.5.
How many electrons in an atom can have n=3, l=2, m=-1?
-
40%
a) 2
-
30%
b) 6
-
30%
c)10
-
0%
d)1
Q.6.
The magnetic quantum number for the valance electron of Caesium ( at no 55) is
-
18%
a) 3
-
18%
b) 0
-
36%
c)-3
-
27%
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
-
9%
a) It is zero at the nucleus
-
18%
b) It is zero on the Z-axis
-
45%
c) It is same on all sides around the nucleus
-
27%
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
-
0%
a)a principal shell
-
30%
b) different subshells
-
40%
c)orbitals with slightly different energies
-
30%
d)degenerate orbitals
Q.9.
ThE number of nodes in the shape of ns-orbital is equal to
-
0%
a) n
-
10%
b) n+1
-
90%
c)n-1
-
0%
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
-
22%
a) 0
-
22%
b) 2
-
0%
c)-2
-
56%
d)3
Q.11.
The possible subshells in n=3 energy shell are
-
80%
a) s, p, d
-
10%
b) s, p, d, f
-
0%
c) s, p
-
10%
d) s only
Q.12.
The d-orbital whose four lobes lie along the axis is
-
11%
a)dz2
-
0%
b) dxy
-
33%
c)dyz
-
56%
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
-
14%
a) 2,1,0,-1/2
-
0%
b) 2,0,1,+1/2
-
86%
c)2,1,1,-1/2
-
0%
d)2,1,-1,+1/2
Q.14.
he shape of the orbital with l=1 and m=0 is
-
25%
a) spherical
-
50%
b) dum-bell
-
12%
c)clover leaf
-
12%
d)dough nut
Q.15.
The correct set of quantum numbers for the unpaired electron of Cl atom is
-
11%
a) 2, 0, 0, +1/2
-
56%
b) 2, 1, -1, +1/2
-
33%
c) 3, 1, 1, ±1/2
-
0%
d) 3, 0, 0, ±1/2
Q.16.
in Aufbau principle, the word 'Aufbau'
-
20%
a)represents the name of scientist who developed the principle
-
50%
b) is a german word which means "building up"
-
10%
c)is related to the energy of electron
-
20%
d)is related to angular momentum of the electron
Q.17.
In an atomic orbital, the sign of lobes indicates the
-
25%
a) sign of the probability distribution
-
25%
b) sign of charge
-
25%
c)sign of wave function
-
25%
d)presence or absence of electron
Q.18.
Which shell would be the first to have g-subshell
-
12%
a) 4th
-
62%
b) 5th
-
25%
c)6th
-
0%
d)7th
Q.19.
The ( n+l) value of 3d energy level is
-
29%
a) 5
-
43%
b) 4
-
0%
c) 3
-
29%
d) 2
Q.20.
An orbit with l=0 is symmetric about the
-
12%
a)x-axis only
-
0%
b) y-axis only
-
12%
c)z-axis only
-
75%
d)nucleus
Q.21.
Which of the following orbital does not make sense?
-
0%
a) 3d
-
62%
b) 3f
-
12%
c)5p
-
25%
d)7s
Q.22.
or given principal level n=4 the energies of its sub-shells are in the order
-
0%
a) s
- 29%
b)s- 71%
c)d- 0%
d)sQ.23.Which of the following orbital does not exists-
17%
a) dx2- y2
-
67%
b) dx2- z2
-
17%
c) dxz
-
0%
d) dxy
Q.24.In which of the following electron distribution in ground state, only Hund's rule is violated-
14%
a)
-
0%
b)
-
86%
c)
-
0%
d)
Q.25.Which of the following orbitals has appearance like a baby soother?-
0%
a) dxy
-
0%
b) dyz
-
67%
c)dx2-y2
-
33%
d)dz2
Explanation
Q.26.How many electrons can have n=4 and l=2-
0%
a) 6
-
40%
b) 10
-
20%
c)18
-
40%
d)32
Q.27.In which of the following case, the degeneracy of orbitals does not exist?-
25%
a) s-subshell
-
50%
b) p-subshell
-
0%
c) d-subshell
-
25%
d) f-subshell
Q.28.Number of unpaired electrons in chromium ( Z=24) is-
33%
a)4
-
33%
b) 3
-
33%
c)6
-
0%
d)5
Q.29.Which of the following statement is incorrect?-
20%
a) Probabilities are found by solving Schrodinger wave equation
-
40%
b) Energy of the electron at infinite distance is zero and yet it is maximum
-
20%
c)Some spectral lines of an element may have the same wave number
-
20%
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.-
40%
a)n=2, l=1, l=-1, s=1/2
-
60%
b) n=3, l=1, l=-1, s=1/2
-
0%
c) n=3, l=0, l=0, s=1/2
-
0%
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-
0%
a)
-
29%
b)
-
43%
c)
-
29%
d)
Q.32.Electronic configuration of hydride ion is-
17%
a)1s1
-
0%
b) 1s1 2s1
-
83%
c)1s2
-
0%
d)1s0
Q.33.Which of the following statement relating to the spectrum of hydrogen atom is false-
0%
a) the lines can be defined by quantum number
-
57%
b) the line of shortest wavelength in blamer series corresponds to n=3 and n=2 levels
-
14%
c)The spectral lines are closer together at long wavelengths
-
29%
d)A continuum occurs at n=∞
Q.34.he number of unpaired electrons in Cu+ is (z=29)-
0%
a)1
-
33%
b)2
-
33%
c)0
-
33%
d)3
Q.35.Which of the following statement is correct?-
33%
a) An orbital containing an electron having quantum numbers n=2, l=0, s=+1/2 is spherical
-
33%
b) All photons have same energy
-
17%
c) The frequency of X-rays is less than radio waves
-
17%
d) As intensity of light increases, the frequency increases
Q.36.The set of quantum numbers for the 19th electron in chromium is-
43%
a)n=4, l=0, m=0, s=+1/2 or -1/2
-
14%
b) n=3 , l=2, m=1, s=+1/2 or -1/2
-
43%
c)n=3, l=2, m=-1, s=+1/2 or -1/2
-
0%
d)n=4 , l=1, m=0, s=+1/2 or -1/2
Q.37.Which of the following species is diamagnetic-
29%
a) Ti2+ ( Z=22)
-
29%
b)Zn1+ (Z=30)
-
29%
c)Ni1+ (Z=28)
-
14%
d)Cr3+ (Z=24)
Q.38.hich out of following configuration is incorrect-
14%
a) 1s2, 2s2, 2px2, 2py2,2pz0
-
14%
b)1s2, 2s2, 2px2, 2py1
-
71%
c)1s2, 2s2, 2px1, 2px1,2py1, 2pz1
-
0%
d)1s2, 2s2,2p6,3s2, 3p6, 3d5, 4s1
Q.39.A mass spectrograph is an instrument which is capable of differentiating and identifying particles-
0%
a) of different masses
-
14%
b) of different charges
-
71%
c) of +ve and -ve charge respectively
-
14%
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-
0%
a)32
-
33%
b) 42
-
17%
c)30
-
50%
d)34
Q.41.The ion/molecule that is iso electronic with CO is-
43%
a) CN-
-
43%
b) O22-
-
14%
c)N2+
-
0%
d)O2
Q.42.The number of electron having m=-1 in phosphorus atom is-
0%
a) 3
-
17%
b) 4
-
67%
c)6
-
17%
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-
50%
a) 8
-
17%
b) 2
-
17%
c) 16
-
17%
d) 11
Q.44.In which of the following all the electrons are paired-
0%
a)atom with atomic number 22
-
57%
b) nitride ion
-
0%
c)atom with configuration 3s2 3p4
-
43%
d)in all
Q.45.The number of half filled orbitals in Fe3+ ion ( atomic number of Fe=26) is-
33%
a) 3
-
33%
b) 4
-
33%
c)5
-
0%
d)6
Q.46.In the energy level sequence for multi-electron atom, 4f-orbital lies between-
33%
a) 6s and 5d
-
50%
b) 5p and 5d
-
17%
c)4p and 5p
-
0%
d)5d and 6d
Q.47.The correct electronic configuration of Fe3+ ion is Z=26-
0%
a) [Ar]3d6
-
33%
b) [Ar]3d5
-
50%
c) [Ar]3d4
-
17%
d) [Ar]3d6, 4s2
Q.48.The correct electron configuration for Ni2+ is (Z=28)-
33%
a)[Ar]4s23d6
-
17%
b) [Ar]4s2 3d6
-
33%
c)[Ar]3d8
-
17%
d)[Ar]4s23d10
Q.49.Which of the following is wrong?-
33%
a) cathode rays have constant e/m ratio
-
0%
b) e/m ratio of anode rays is not constant
-
50%
c)e/m ratio of protons is not constant
-
17%
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-
0%
a) 4d
-
29%
b) 4f
-
71%
c)5s
-
0%
d)6s
- 29%
