What is the maximum number of electrons that can be associated with the following set of quantum numbers? 
n = 3, l = 1 and m = –1.
1. 6
2. 4
3. 2
4. 10

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 77%
From NCERT
AIPMT - 2013
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Based on equation E = –2.178 × 10–18J, Z2n2 certain conclusions are written. Which of them is not correct?

1. Larger the value of n, the larger the orbit radius.
2. Equation can be used to calculate the change in energy when the electron changes orbit.
3. For n = 1, the electron has a more negative energy than it does for n = 6 which means that the electron is more loosely bound in the smallest allowed orbit.
4. The negative sign in the equation simply means that the energy of the electron bound to the nucleus is lower than what it would be if the electrons were at an infinite distance from the nucleus.
Subtopic:  Bohr's Theory |
 65%
From NCERT
AIPMT - 2013
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Maximum number of electrons in a subshell with l = 3 and n = 4 is:

1. 14

2. 16

3. 10

4. 12

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 84%
From NCERT
AIPMT - 2012
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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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The total number of atomic orbitals in fourth energy level of an atom is:

1.  16
2.  32
3.  4
4.  8

Subtopic:  Bohr's Theory |
 76%
From NCERT
AIPMT - 2011
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The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ1 and λ2 will be:

1.  λ1=2λ2

2.  λ1=4λ2

3.  λ1=12λ2

4.  λ1=λ2

Subtopic:  Bohr's Theory |
 85%
From NCERT
AIPMT - 2011
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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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If uncertainty in position and momentum are equal, then the uncertainty in velocity is:

1. 12mhπ

2. h2π

3. 1mhπ

4. hπ

Subtopic:  Heisenberg Uncertainty Principle |
 80%
From NCERT
AIPMT - 2008
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