Select Chapter Topics:
Q. No.Total number of orbitals that is/are considered as axial orbital(s) is:
\(p_x, p_y, p_z, d_{xy}, d_{yz}, d_{zx}, d_{x^2−y^2}, d_{z^2}~\)
1. 8
2. 3
3. 2
4. 5
Subtopic: Shell & Subshell |
65%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
The speed of an electron in the 7th orbit is 3.6 x 106 m/s, the speed in 3rd orbit is-
1. 3.6 x 106 m/s
2. 8.4 x 106 m/s
3. 7.5 x 106 m/s
4. 1.8 x 106 m/s
1. 3.6 x 106 m/s
2. 8.4 x 106 m/s
3. 7.5 x 106 m/s
4. 1.8 x 106 m/s
Subtopic: Bohr's Theory |
77%
JEE
Please attempt this question first.
Hints
The ionization energy of a hydrogen atom is 13.6 eV. What is the ionization energy of a Li²⁺ ion?
| 1. | 54.4 eV | 2. | 122.4 eV |
| 3. | 13.6 eV | 4. | 3.4 eV |
Subtopic: Hydrogen Spectra |
78%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
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)
(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 |
84%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
Two metals are given:
Metal – 1: Work function = 4.8 eV
Metal – 2: Work function = 2.8 eV
Photons of wavelength 350 nm are incident on both metals separately. Which metal will eject electrons at this wavelength?
1. Metal-1 only
2. Metal-2 only
3. Both metal -1 and metal -2
4. None of metal -1 and metal -2
Metal – 1: Work function = 4.8 eV
Metal – 2: Work function = 2.8 eV
Photons of wavelength 350 nm are incident on both metals separately. Which metal will eject electrons at this wavelength?
1. Metal-1 only
2. Metal-2 only
3. Both metal -1 and metal -2
4. None of metal -1 and metal -2
Subtopic: Photo Electric Effect |
73%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
An electron in \(Be^{3+} \) goes from n=4 to n=2 . The amount of energy released in eV is:
(Ground state energy of H- atom = 13.6 eV)
1. 40.8 eV
2. 122.4 eV
3. 217. 6 eV
4. 21.17 eV
(Ground state energy of H- atom = 13.6 eV)
1. 40.8 eV
2. 122.4 eV
3. 217. 6 eV
4. 21.17 eV
Subtopic: Hydrogen Spectra |
80%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
Electrons are emitted in a cathode ray tube with a velocity of 1000 m/s. Select the correct statement among the following is:
| 1. | The de Broglie wavelength of an electron is 666.67 nm. |
| 2. | The cathode rays travel from the cathode to the anode. |
| 3. | The characteristics of electrons depend on the metal used in the cathode. |
| 4. | The characteristics of electrons depend on the gas filled inside the cathode tube. |
Subtopic: Introduction of Atomic Structure | De Broglie Equation |
67%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
A hydrogen atom in its ground state absorbs 12.75 eV of energy. The orbital angular momentum of the electron becomes \(\frac{nh}{2\pi}\). What is the value of n?
1. 3
2. 4
3. 5
4. 2
1. 3
2. 4
3. 5
4. 2
Subtopic: Hydrogen Spectra |
63%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
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 |
81%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
The shortest wavelength in the Lyman series of H-atom is λ. and the longest wavelength in the Balmer series of He+ is \(\frac{x\lambda}5\).
The value of x is:
1. 7
2. 11
3. 13
4. 9
The value of x is:
1. 7
2. 11
3. 13
4. 9
Subtopic: Hydrogen Spectra |
67%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.