The correct set of four quantum numbers for the valence electron of rubidium atom (Z =37) is

1. 5, 1, 1, +1/2               

2. 6, 0, 0, +1/2

3. 5, 0, 0, +1/2               

4. 5, 1, 0, +1/2

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 79%
From NCERT
NEET - 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:  Quantum Numbers & Schrodinger Wave Equation |
 74%
From NCERT
NEET - 2011
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If the principal quantum number n=6, the correct sequence of filling of electrons will be:

(1) ns→np→(n-1)d→(n-2)f

(2) ns→(n-2)f→(n-1)d→np

(3) ns→(n-1)d→(n-2)f→np

(4) ns→(n-2)f→np→(n-1)d

 

 

Subtopic:  AUFBAU Principle |
 64%
From NCERT
NEET - 2011
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Which one of the following ions has electronic configuration [Ar]3d6?

(At. no: Mn = 25, Fe = 26, Co = 27, Ni =28)

1. Ni3+               

2. Mn3+

3. Fe3+               

4. Co3+

Subtopic:  AUFBAU Principle |
 78%
From NCERT
NEET - 2010
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Which one of the elements with the following outer orbital configurations may exhibit the

largest number of oxidation states ?

1. 3d3, 4s2

2. 3d5, 4s1

3. 3d5, 4s2

4. 3d2, 4s2

Subtopic:  AUFBAU Principle |
 63%
NEET - 2009
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Maximum number of electrons in a subshell of an atom can be determined by which of the following formula :

1. 4l + 2

2. 2l + 1

3. 4l - 2

4. 2n2

Subtopic:  Shell & Subshell |
 64%
From NCERT
NEET - 2009
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The energy absorbed by each molecule(A2) of a substance is 4.4×10-19J and bond energy per molecule is 4.0×10-19J the  energy of the molecule per atom will be:
1. 2.2×10-19J
2. 2.0×10-19J
3. 2.0×10-20J
4. 4.0×10-20J
 
Subtopic:  Planck's Theory |
NEET - 2009
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Which of the following is not permissible arrangement of electrons in an atom ?

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 |
 88%
From NCERT
NEET - 2009
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If uncertainty in position and momentum are both equal, then uncertainty in velocity is: 

1. 12mhπ

2. h2π

3. 1mhπ

4. hπ

Subtopic:  Heisenberg Uncertainty Principle |
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From NCERT
NEET - 2008
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The measurement of the electron position is associated with an uncertainty in momentum which is equal to 1x10-18 g cm s-1. The uncertainty in velocity of the electron will be:

(mass of an electron is 9 x 10-28 g)

1. 1 x 109 cm s-1                     

2. 1 x 106 cm s-1

3. 1 x 105 cm s-1                     

4. 1 x 1011 cm s-1

Subtopic:  Heisenberg Uncertainty Principle |
 63%
From NCERT
NEET - 2008
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