Pauli's Exclusion Principle

Q.

What is the maximum number of electrons in the 4d subshell?

Q. Any '$p$' orbital can accommodate upto:

1. Four electrons
2. Six electrons
3. Two electrons with parallel spins
4. Two electrons with opposite spins

Q. If nitrogen atom had an electronic configuration of $1s^7$, it would have energy lower than it’s normal ground state configuration of $1s^{2}2s^{2}2p^3.Yet,1s^7$ is not observed as it violates:

1. Bohr postulates
2. Hund' s rule
3. Pauli' s exclusion principle
4. Bohr-Bury rule

Q.

Q6-(1)-Name the members of alkali metal group which has the

Highest ionization energy

Q. In an atom, the total number of electrons having quantum numbers $n=4,|m_l|=1$ and $m_s=-\frac{1}{2}$ is :

1. 6
2. 12
3. 13
4. 10

Q. How to find the number of unpaired electrons in a particular atom

Q. The correct set of quantum numbers among the following is:

1. $n=3l=2m=-3s=+\frac{1}{2}$
2. $n=4l=1m=2s=-\frac{1}{2}$
3. $n=5l=5m=1s=+\frac{1}{2}$
4. $n=2l=1m=0s=+\frac{1}{2}$

Q. The orbital diagram in which the aufbau principle is violated:

1. 
2. 
3. 
4. 

Q. If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:

1. $1s^{2}2s^1$
2. $1s^{1}2s^2$
3. $1s^3$
4. $1s^{1}2s^{1}2p^1$

Q. If the nitrogen atom had an electronic configuration of $1s^7$ it would have lower energy than that of the normal ground state configuration $1s^2,2s^2,2p^3$ because the electrons would be closer to the nucleus. $1s^7$ is not observed because it violates:

1. Heisenberg’s uncertainty principle
2. Pauli's exclusion principle
3. Hund’s rule
4. Aufbau Principle

Q.

Write the distribution of electrons in the carbon

Q. A '$d$' subshell containing four unpaired electrons can exchange:

1. Four times
2. Three times
3. Sixteen times
4. Six times

Q. The maximum number of electrons that can have principal quantum number, $n=4$ and spin quantum number, $m_s=-\frac{1}{2}$ is:

1. $8$
2. $9$
3. $16$
4. $32$

Q. How many electrons (maximun number) can fit in the orbital for which $n=3$ and $l=0$?

1. $3$
2. $1$
3. $2$
4. $6$

Q. Which of the following statements is/are correct?

1. The electronic configuration of $F{e}^{2+}$ is (atomic number = 26) is $\left[Ar\right]3d^6$
2. According to Pauli's exclusion principle, the maximum number of electrons in an orbital cannot exceed 2
3. In Vanadium atom, 12 electrons can have a spin of $+\frac{1}{2}$ and the other 11 electrons can have a spin of $-\frac{1}{2}$ (Z = 23)
4. All of the above

Q.

The Pauli exclusion principle states that:

Q.

Electron occupies the available orbital singly before pairing in any one orbital occurs, it is

1. Hund's Rule

2. Pauli's exclusion principle

3. Heisenberg's principle

4. Prout's hypothesis

Q.

Use Hund’s rule to derive the electronic configuration of Ce³⁺ ion and calculate its magnetic moment on the basis of ‘spin-only’ formula.

Q. Consider two cations $X$ and $Y$ which have 8 and 18 electrons respectively in their outermost shell (both belong to $3d-$ series). Select the correct statement(s) among the following.

1. Both the cations have 8 electrons in their penultimate shell.
2. Difference between the total number of electrons of $X$ and $Y$ is 10.
3. Cation $Y$ may be of element $Ni$.
4. Cation $X$ may be of element $Sc$.

Q. In a set of degenerate orbitals, electrons distribute themselves to retain similar spins as far as possible. This statement is attributed to:

1. Hund' s rule
2. Aufbau rule
3. Slater' s rule
4. Pauli' s principle

Q.

Can Paulis exclusion principle be violated?

Q. The number of electron associated with quantum numbers $n=5,m_s=+\frac{1}{2}$ is

1. 15
2. 50
3. 25
4. 11

Q. No.of nodal planes in $3d$-orbitals are :

1. 2
2. 5
3. 4
4. 10

Q. Ground state electronic configuration of P atom can be represented as

1. 
2. 
3. 
4. 

Q.

In an atom, the total number of electrons having quantum number
$n=4,|m_l|=1and{m}_s=-\frac{1}{2}is$ ___

Q. If Azimuthal quantum number has possible values from $0$ to $n+1$ and there are $3$ possible values for spin quantum number $(+\frac{1}{2},0,-\frac{1}{2})$, then maximum number of electrons which can be filled into $3$rd orbit are:

1. $25$
2. $50$
3. $75$
4. $100$

Q. The orbital diagram in which both Pauli's Exclusion Principle as well as Hund's Rule are violated is:

1. 
   
2. 
3. 
4. 

Q. The orbital diagram in which both the Pauli’s exclusion principle and Hund’s rule are violated is:

1. 
2. 
3. 
4. 

Q. In an atom, the total number of electrons having quantum numbers $n=4,|m_l|=1$ and $m_s=-\frac{1}{2}$ is :

1. 6
2. 12
3. 13
4. 10

Q. Which of the following options represent correct set of quantum numbers?

1. $n=0,l=0,m=0,s=+\frac{1}{2}$
2. $n=1,l=0,m=0,s=-\frac{1}{2}$
3. $n=1,l=1,m=0,s=+\frac{1}{2}$
4. $n=2,l=0,m=0,s=-\frac{1}{2}$