The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of:
1. s-electrons in Mg (Z = 12)
2. p-electrons in Cl (Z = 17)
3. d-electrons in Fe (Z = 26)
4. p-electrons in Ne (Z = 10)

Subtopic:  AUFBAU Principle |
 64%
From NCERT
NEET - 2015
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The angular momentum of electrons in d orbital is equal to:
1. 6 h
2. 2h
3. 23 h
4. 0 h

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 77%
NEET - 2015
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The correct set of four quantum numbers for the valence electron of a rubidium atom (Z =37) is: 

1. \(5,1,1,+ {1 \over2}\) 2. \(6,0,0,+ {1 \over2}\)
3. \(5,0,0,+ {1 \over2}\) 4. \(5,1,0,+ {1 \over2}\)
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 80%
From NCERT
AIPMT - 2012
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If n = 6, the correct sequence for the filling of electrons will be: 

1. ns  n-1 d  n-2 f  np

2. ns - n-2 f  np  n-1 d

3. ns - np  n-1d  n-2 f

4. ns  n-2 f  n-1 d  np

Subtopic:  AUFBAU Principle |
 64%
From NCERT
AIPMT - 2011
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The rule used to determine the maximum number of electrons in a subshell of an atom is:

1. 4l+2 2. 2l+1
3. 4l-2 4. 2n2
Subtopic:  Shell & Subshell |
 68%
From NCERT
AIPMT - 2009
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The incorrect set of quantum numbers among the following is:

1. n= 4, l= 0, m= 0, s= -1/2
2. n= 5, l= 3, m= 0, s= +1/2
3. n= 3, l= 2, m= -3, s= -1/2
4. n= 3, l= 2, m= 2, s= -1/2

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 86%
From NCERT
AIPMT - 2009
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The orbital diagram in which both Pauli's exclusion principle and Hund's rule are violated is: 
 

1.    

2.    

3.    

4.    

Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
 68%
From NCERT
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The correct order of the total number of nodes of atomic orbitals is: 

1.  4f > 6s > 5d

2.  6s > 5d > 4f

3.  4f > 5d > 6s

4.  5d > 4f > 6s

Subtopic:  Nodal Plane |
 73%
From NCERT
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Correct statement among the following is: 

1.  Number of angular nodes = n - l - 1

2.  Number of radial nodes = l

3.  Total number of nodes = n -1

4.  All of the above

Subtopic:  Nodal Plane |
 61%
From NCERT
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Orbitals having two spherical nodes are: 

1. 2s 2. 4s
3. 3d 4. 6f
Subtopic:  Nodal Plane |
From NCERT
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