The maximum number of electrons in the n = 4 shell is:

1. 72
2. 50
3. 16
4. 32

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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The orbital angular momentum value for 3s orbital is:
1. 0 2. 1
3. 2 4. –1
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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The ratio of radii of 2nd & 3rd Bohr’s orbit of H-atom is:

1. 2 : 3
2. 3 : 2
3. 4 : 9
4. 9 : 4
Subtopic:  Hydrogen Spectra |
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Incorrect set of quantum numbers from the following is:

1. n=4, l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=-1/2
2. n=5, l=2, m1 =-2, -1, +1, +2, ms=+1/2
3. n=4, l=2, m1 = -2, -1, 0, +1, +2, ms=-1/2
4. n=5, l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=+1/2
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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NEET - 2023
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Consider the following combination of n, l, and m values.
(i) n=3; l=0; m=0
(ii) n=4; l=0; m=0
(iii) n=3; l=1; m=0
(iv) n=3; l=2; m=0
The correct order of energy of the corresponding orbitals for multielectron species: 

1. (ii) > (i)> (iv)> (iii)
2. (iv) > (ii) > (iii) > (i)
3. (i) > (iii) > (iv) > (ii)
4. (iv) > (iii) > (i) > (ii)
Subtopic:  Shell & Subshell |
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The radius of the second orbit of the \(\text{Li}^{2+}\) ion is x. What will be the radius of the third orbit of the \(\text{Be}^{3+}\) ion?
1. \(\dfrac{27 x}{16}\) 2. \(\dfrac{16 x}{27}\)
3. \(\dfrac{4 x}{3}\) 4. \(\dfrac{3 x}{4}\)
Subtopic:  Hydrogen Spectra |
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How many total orbitals are there with principal quantum number n = 4?

1. 1
2. 4
3. 9
4. 16
Subtopic:  Shell & Subshell |
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Which set of quantum numbers is not possible?

1. n = 2, l = 1, ml = +1, ms = –1⁄2
2. n = 3, l = 2, ml = +1, ms= +1⁄2
3. n = 4, l = 4, ml = –1, ms = +1⁄2
4. n =5, l = 2, ml = +2, ms = –1⁄2
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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Identify pair of symbols that represents nuclei that have the same number of neutrons.

1. \({ }_{26}^{56} \mathrm{Fe}\text{ and }{ }_{28}^{58} \mathrm{Ni} \)
2. \({ }_{26}^{58} \mathrm{Fe}\text{ and }{ }_{26}^{56} \mathrm{Fe}^{2+} \)
3. \({ }_{27}^{57} \mathrm{Co}\text{ and }{ }_{28}^{57} \mathrm{Ni} \)
4. \({ }_{28}^{57} \mathrm{Ni}\text{ and }{ }_{28}^{58} \mathrm{Ni} \)
Subtopic:  Number of Electron, Proton & Neutron |
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All of the energy levels listed below are allowed, except one. Find that odd one out:

1. 3f
2. 4d
3. 5p
4. 7s
Subtopic:  Shell & Subshell |
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