Test: Electromagnetic radiation, Bohr model - JEE MCQ
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20 Questions MCQ Test - Test: Electromagnetic radiation, Bohr model
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Test: Electromagnetic radiation, Bohr model - Question 1
What is the angular velocity 
of an electron occupying second orbit of 
ion?
of an electron occupying second orbit of ion?
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Test: Electromagnetic radiation, Bohr model - Question 2
The ion that is isoelectronic with CO is-
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 2
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Test: Electromagnetic radiation, Bohr model - Question 3
The energy of an electron in first Bohr orbit of 
atom is 
. The energy value of electron in the excited state of 
is:
atom is . The energy value of electron in the excited state of is:
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 3
Test: Electromagnetic radiation, Bohr model - Question 4
The Bohr's energy equation for H atom reveals that the energy level of a shell is given by E = −13.58/n2eV. The smallest amount that an H atom will absorb if in ground state is
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Test: Electromagnetic radiation, Bohr model - Question 5
If the electron of a hydrogen atom is present in the first orbit, the total energy of the electron is
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Test: Electromagnetic radiation, Bohr model - Question 6
An electron, e1 is moving in the fifth stationary state, and another electron e2 is moving in the fourth stationary state. The radius of orbit of electron, e1 is five times the radius of orbit of electron, e2 calculate the ratio of velocity of electron e1(v1) to the velocity of electron e2(v2)
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Test: Electromagnetic radiation, Bohr model - Question 7
In a hydrogen atom, if energy of an electron 1n ground state is 13.6.ev, then that in the 2nd excited state is
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or 
Test: Electromagnetic radiation, Bohr model - Question 8
What is the ratio of the atomic radius of the 5th orbit in chlorine atom and 3rd orbit in Helium atom?
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Test: Electromagnetic radiation, Bohr model - Question 9
An electron in an atom jumps in such a way that its kinetic energy changes from 
to 
. The change in potential energy will be:
to . The change in potential energy will be:
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Test: Electromagnetic radiation, Bohr model - Question 10
What atomic number of an element "X" would have to become so that the 4 th orbit around X would fit inside the I Bohr orbit of H atom?
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Test: Electromagnetic radiation, Bohr model - Question 11
If in Bohr's model, for unielectronic atom, time period of revolution is represented as 
where n represents shell no. and 
represents atomic number then the value of 
will be :
where n represents shell no. and represents atomic number then the value of will be :
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Test: Electromagnetic radiation, Bohr model - Question 12
The energy of 
in first orbit of 
is 
. The energy of 
in first orbit of 
is:
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Test: Electromagnetic radiation, Bohr model - Question 13
If radius of second stationary orbit (in Bohr's atom) is 
then radius of third orbit will be:
then radius of third orbit will be:
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Test: Electromagnetic radiation, Bohr model - Question 15
The energy of an electron in first Bohr orbit of 
-atom is 
. The possible energy value of electron in the excited state of 
is
-atom is . The possible energy value of electron in the excited state of is
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 15
and for 
ion, 
Test: Electromagnetic radiation, Bohr model - Question 16
The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [a0 is Bohr radius] :
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Bohr orbit
Test: Electromagnetic radiation, Bohr model - Question 17
The potential energy of the electron present in the ground state of 
ion is represented by:
ion is represented by:
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 17
, where 
atomic number of an atom
ion is 
Test: Electromagnetic radiation, Bohr model - Question 18
The ratio of kinetic energy and total energy of an electron in Bohr orbit of hydrogen-like species is
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Test: Electromagnetic radiation, Bohr model - Question 19
The speed of an electron in the first Bohr orbit is 
. The speed of electron in the 
level of 
ion will be
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 19
, we will have 
Test: Electromagnetic radiation, Bohr model - Question 20
Which of the following statements regarding Bohr theory of hydrogen atom is not correct?
Detailed Solution for Test: Electromagnetic radiation, Bohr model - Question 20
around the nucleus in a stationary orbit of radius 
. The electrostatic force acting on the electron is balanced by the centrifugal force i.e. 
where 
... (1)
... (2)
(using (2))
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