21.
Quantum numbers n=2,l=1 represent
A
1s orbital
B
2p orbital
C
2s orbital
D
3s orbital
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Quantum numbers n=2,l=1 represent
1s orbital
2p orbital
2s orbital
3s orbital
Iso-electronic species are
F-,O-2
F-,O+
F-,O
F-,O+2
The correct order of increasing energy of atomic orbitals is
5p<4f<6s<5d
4f<5p<5d<6s
5p<6s<4f<5d
5p<5d<4f<6s
Azimuthal quantum number defines
e/m ratio of electron
Angular momentum of electron
Spin of electron
Magnetic momentum of an electron
The following quantum numbers are possible for how many electrons? n=3, l=2, m=+2
1
2
18
4
What is the wavelength of light. Given energy =3.03 x 10-19 j, h=6.62 x 10-34 js and c=3.0 x 10 8 m/s?
6.54nm
654nm
0.654nm
65.4 nm
The species which is not paramagnetic among the following is;
Cl-
Be-
Ne+2
As+
Bohrs radius for H-atom(n=1) is approximately0.53Ao. The radius of the first excited (n=2) is;
0.13 Ao
1.06Ao,
4.77Ao
2.12Ao
The total number of orbitals in a shell having principle quantum number n is;
2n
n2
2n2
(n+l)
Which of the following orbitals has dumb-bell shape
s
p
d
f
The electronic configuration of Cu+2 ion is;
[Ar} 4s1 3d8
[Ar] 4s1 3d10
[Ar] 4s2 3d10 4p1
[Ar] 3d9
The configuration 1s2, 2s2, 2p5, 3s1 shows
Ground state of fluorine
Excited state of neon
Excited state of fluorine
Excited state of - ion
The number of spherical nodes for 4d orbital is
Zero
Two
One
Three
Which expression represents de-Broglie relationship?
h/mv = ρ
λ= h/mρ
h/mv = λ
mλ = v/ρ
A g-sub shell is characterized by
n=5
m=3
l= 4
l= 5
Which of the following atoms or ion/atom have identical ground state configuration?
Li+ and He+
Na and K
Cl- and Ar
F+ and Ne
For which of the following set of quantum numbers, an electron will have the highest energy?
3, 2, +1, +1/2
4, 1, 0, -1/2
4, 2, -1, +1/2
5, 0, 0, +1/2
Which term best describes the process by which particles escape from the surface of a nonboiling liquid and enter the gas state?
sublimation
evaporation
surface tension
aeration
Which process can be explained by the kinetic-molecular theory?
combustion
oxidation
condensation
displacement reactions
Which is an example of gas diffusion?
inflating a flat tire
the odor of perfume spreading throughout a room
a cylinder of oxygen stored under high pressure
All of the above