The relation between $$n_m$$ ($$n_m$$ = number of permissible values of magnetic quantum number (ml) for a given value of azimuthal
quantum number (l) is:
1. $$n_m = l+2$$
2. $$l = {n_m -1 \over 2}$$
3. $$l= 2n_m +I$$
4. $$n_m = 2l^2 + I$$
Subtopic:  Shell & Subshell |
66%
From NCERT
NEET - 2023
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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 |
80%
From NCERT
NEET - 2023
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Given below are two statements:
 I: The value of wave function, $$\Psi$$ depends upon the coordinates of the electron in the atom II: The probability of finding  an electron at a point within an atom is proportional to the orbital wave function

In light of the above statements, choose the correct answer from the options given below:

1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true.
3. Both Statement I and Statement II are true.
4. Both Statement I and Statement II are false.
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
From NCERT
NEET - 2023
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If radius of second Bohr orbit of the $$He^+$$ ion is 105.8 pm, what is the radius of third Bohr orbit of $$Li^{2+}$$ ion?
 1 158.7 Å 2 158.7 pm 3 15.87 pm 4 1.587 pm
Subtopic:  Hydrogen Spectra |
76%
From NCERT
NEET - 2022
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Which one of the following electrons in the ground state will have least amount of energy?

 1 An electron in hydrogen atom. 2 An electron in 2p orbital of carbon atom. 3 The electron of copper atom present in 4s orbital. 4 The outermost electron in sodium atom.
Subtopic:  AUFBAU Principle |
65%
From NCERT
NEET - 2022
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A monochromatic infrared range finder of power 1mW emits photons with wavelength 1000 nm in 0.1 second. The number of photons emitted in 0.1 second is-
(Given: h = $$6.626 \times 10^{-34} J~s$$ , c = $$3 \times 10^8 m~s^{-1},$$ Avogadro number = $$6.022 \times 10^{23}$$)
1. $$30 \times 10^{37}$$
2. $$5 \times 10^{14}$$
3. $$30 \times 10^{34}$$
4. $$5 \times 10^{11}$$

72%
From NCERT
NEET - 2022
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Match List-I with List-II:
 List-I (quantum number) List-II (Orbital) (A) n = 2, $$\ell$$ = 1 (I) 2s (B) n = 3, $$\ell$$ = 2 (II) 3s (C) n = 3, $$\ell$$ = 0 (III) 2p (D) n = 2, $$\ell$$ = 0 (IV) 3d

Choose the correct answer from the options given below:

 (A) (B) (C) (D) 1. (III) (IV) (I) (II) 2. (IV) (III) (I) (II) 3. (IV) (III) (II) (I) 4. (III) (IV) (II) (I)
Subtopic:  Shell & Subshell |
83%
From NCERT
NEET - 2022
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When electromagnetic radiation of wavelength 300 nm falls on the surface of a metal, electrons are emitted with the kinetic energy of 1.68 × 105 J mol–1. The minimum energy needed to remove one mole of electron from the metal is:

(h = 6.626 × 10–34 Js, c = 3 × 108 ms–1, NA = 6.022 × 1023 mol–1)

1.  2.31 × 106 J mol–1
2.  3.84 × 104 J mol–1
3.  3.84 × 10–19 J mol–1
4.  2.31 × 105 J mol–1
Subtopic:  Photo Electric Effect |
From NCERT
NEET - 2022
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A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light, $\mathrm{c}=3.0×{10}^{8}$ ${\mathrm{ms}}^{-1}$]

 1 2192 m 2 21.92 cm 3 219.3 m 4 219.2 m
53%
From NCERT
NEET - 2021
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The number of protons, neutrons, and electrons in  $$_{71}^{175}Lu$$ respectively, are:

1.  104, 71 and 71

2.  71, 71 and 104

3.  175, 104 and 71

4.  71, 104 and 71

Subtopic:  Introduction of Atomic Structure | Number of Electron, Proton & Neutron |
80%
From NCERT
NEET - 2020
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