Calculate the energy in Joule corresponding to light of wavelength 45 nm : (Planck's

constant h = 6.63 x 10-34 Js; speed of light c = 3 x 108 ms-1)

1. 6.67 x 1015                             

2. 6.67 x 1011

3. 4.42 x10-15                             

4. 4.42 x 10-18

Subtopic:  Planck's Theory |
 75%
From NCERT
NEET - 2014
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What is the maximum numbers of electrons that can be associated with the following set

of quantum numbers?

n=3, l = 1 and m=-1

1. 10

2. 6

3. 4

4. 2

 

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 72%
From NCERT
NEET - 2013
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From the given equation, certain conclusions are drawn.
\(\mathrm{E}=-2.178 \times 10^{-18} \mathrm{(J)} \frac{\mathrm{z}^2}{\mathrm{n}^2} \)
Choose the incorrect statement:

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

1. 14

2. 16

3. 10

4. 12

Subtopic:  Shell & Subshell |
 80%
From NCERT
NEET - 2012
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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 |
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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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