Azimuthal quantum number defines :
e/m ratio of electron
angular momentum of electron
spin of electron
magnetic momentum of electron
Assertion : Nuclear binding energy per nucleon is in the order -
Reason : Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
The quantum number m of a free gaseous atom is associated with
the effective volume of the orbital
the shape of the orbital
the spatial orientation of the orbital
the energy of the orbital in the absence of a magnetic field.
Assertion : emits a positron giving .
Reason : In β+ emission neutron is transformed into proton.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Which of the following arrangements is possible?
n | l | m | s |
5 | 2 | 2 |
n | l | m | s |
2 | 2 | 0 |
n | l | m | s |
3 | -2 | 1 |
n | l | m | s |
0 | 0 | 1 |
Which of the following is the correct sequence of atomic weights of the given elements?
Ni> Co> Fe
Fe> Co> Ni
Co> Fe> Ni
Co> Ni> Fe
Assertion : Hydrogen nuclei combines to form helium nuclei then energy is released.
Reason: Binding energy/nucleon of He is greater than hydrogen.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If Assertion is false but Reason is true.
Assertion : Water is used as a moderator in nuclear reactor.
Reason : Moderator is a light substance that absorb neutrons.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If Assertion is false but Reason is true.
A.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Heavy water is used as a moderator in nuclear reactors to absorb high speed neutrons. So that they slow down the rate of nuclear reaction.
Assertion : Ionisation potential of B (atomic no.5) is less than Be (atomic no. 4).
Reason : The first electron released from Be is of p-orbital but that from B is of s-orbital.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If Assertion is false but Reason is true.