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Quiz 179
Mdcat-past-papers Quiz
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3561. What is the radius of the 3rd orbit of electron in H-atom?
3.39A°
4.761A°
5.29 × 10-1A°
9.7A°
3562. Proton is --- times heavier than electron.
1840
1836
1936
2036
3563. The amount of energy associated with quantum of radiation is directly proportional to:
Frequency
Wavelength
Velocity
none
3564. With increases in the value of principal Quantum Numbers 'n' the shape of s-orbital, remains the same although their sizes:
Decreases
Increases
Remains the same
May or not same
3565. There are four orbitals s,p,d,f which order is correct with respect to the increasing energy of the orbital?
4s<p4<d4<4f
4s<4f<4p<4d
4p<4s<4f<4d
4f < 4s <4d < 4p
3566. Which gas in the discharge tube produces lightest canal ray particles?
Ar
He
H2
Ne
3567. The p orbital has
2 lobes
3 lobes
4 lobes
5 lobes
3568. Which of the following has only one orientation in space and in magnetic field?
P orbital
s orbital
d orbital
f orbital
3569. The Magnetic quantum number of 4f orbital would be
-2, -3, -1, 0, +2, +3, +4
-3, -2, -1, 0, +1, +2, +3
-3, -2, -1, 0, +1, +2, +3, +4
-3, -2, -1, 0, +1, +2, +3
3570. If value of azimuthal quantum number is l then value of m will range from:
-1 to 1
-1 to 2
-1 to 3
-1 to 4
3571. The dumb bell like orbitals can move in how many directions?
7
5
1
3
3572. The relationship between quantum number n and l is
n = -l
n = l-2
l = n-1
n = l-2
3573. What is the magnetic quantum number for S-orbital?
1
3
5
7
3574. Which of the following sub-shell does not exist?
1p
5d
3s
2s
3575. Azimuthal quantum number is represented by:
l
s
M
N
3576. If the maximum value of n is 4 then the total electrons in atom will be:
32
60
18
28
3577. In an atom , A electron move in the energy level n=1, while the other electron move in n=3, What are ratios of Kinetic energy of A and B?
1:03
9:01
3:01
1:09
3578. Shape of subshell is explained by
l
m
n
none
3579. 'n' represents which of the following quantum number?
Azimuthal
Principal
Magnetic
Spin
3580. The mass of electron is:
1836 times more than mass of proton
1836 times less than mass of proton
1836 times more than mass of neutron
1836 times more than mass of hydrogen
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