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Class 11
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Chemistry
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Structure of Atom
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Hard Questions
Structure Of Atom
Chemistry
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According to Bohr's theory of hydrogen-atom, for the electron in the
$n_{th}$
permissible orbit
A
$Linear Momentum∝n1 $
B
$Radius of orbit∝n$
C
$Kinetic Energy∝n_{2}1 $
D
$Angular Momentum∝n$
Hard
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If Aufbau rule is not obeyed and the electronic filling occurs orbit by orbit till saturation is reached (for a given principal quantum number
$n$
, electrons are filled in the increasing order of azimuthal quantum number
$l$
), then the percentage change in sum of all
$(n+l)$
values for unpaired electrons in an atom of iron is
$10x$
. What is the value of
$x$
?
A
$5$
B
$6$
C
$7$
D
$3$
Hard
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>
The energy of separation of an electron is
$30.6eV$
moving in an orbit of
$Li_{2+}$
. The number of waves made by the electron in one complete revolution in the orbit is:
Hard
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>
If the principle quantum number n = 6, the correct sequence of filling of electron will be :
A
$ns→$
$(n−2)f$
$→$
np
$→(n−1)$
B
$ns→$
$(n−1)f$
$→$
$np$
$→(n−2)$
C
$ns→np→(n−1)d→(n−2)f$
D
$ns→(n−2)f→(n−1)d→np$
Hard
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>
The orbital diagram in which aufbau principle is violated is:
A
B
C
D
Hard
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>
What principle is violated here?
A
Laws of Motion
B
Energy conservation
C
Nothing is violated
D
Cannot be decided
Hard
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>
In Bohr's model of an atom :
A
Electrons revolve around the nucleus in circular orbits.
B
These circular orbits or shells are stationary.
C
Each shell in associated with a definite amount of energy.
D
All shells have equal energy level.
Hard
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>
Maximum number of electrons in a subshell of an atom is determined by the following:
A
$2l+2$
B
$4l-1$
C
$2n_{2}$
D
$4l + 2$
Hard
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Choose the correct observation.
A
The orbital diagram in which Aufbau principle is obeyed
B
The spectra of
$He$
and
$Li_{+}$
will be similar
C
Following is the violation of Pauli's exclusion principle
D
The
$d−$
orbit involved in
$sp_{3}d$
hybridisation is
$d_{x_{2}−y_{2}}$
Hard
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>
For the hydrogen atom, the energy of the electron is defined by the factor
$E_{n}=−13.58/n_{2}eV$
. Here n is positive integer. The minimum quantity of energy which it can absorb in its primitive stage is:
A
$1.00eV$
B
$3.39eV$
C
$6.79eV$
D
$10.19eV$
Hard
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>