Structure of Atom PYQs - Last 5 Years
JEE Main / Chemistry / Physical Chemistry / 125 recent questions
ChemistryPhysical Chemistry2022-2026
Practice 125 JEE Main Chemistry questions from Structure of Atom. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Structure of Atom Questions
Showing 25 of 125 filtered questions.
1Structure Of Atom
Which of the following statements are correct?
(A) The electronic configuration of Cr is [Ar] 3d5 4s1.
(B) The magnetic quantum number may have a negative value.
(C) In the ground state of an atom, the orbitals are filled in order of their ...
(A) The electronic configuration of Cr is [Ar] 3d5 4s1.
(B) The magnetic quantum number may have a negative value.
(C) In the ground state of an atom, the orbitals are filled in order of their ...
MCQ+4 / -12022
2Structure Of Atom
Which of the following is the correct plot for the probability density \({\psi ^2}\) (r) as a function of distance 'r' of the electron from the nucleus for 2s orbital?
MCQ+4 / -12022
3Structure Of Atom
The minimum uncertainty in the speed of an electron in an one dimensional region of length \(2 \mathrm{a}_{\mathrm{o}}\) (Where \(\mathrm{a}_{\mathrm{o}}=\) Bohr radius \(52.9 \,\mathrm{pm}\)) is _________ \(\mathrm{km} \,\mathrm{s}^{-1}\)....
INTEGER+4 / -12022
4Structure Of Atom
Given below are the quantum numbers for 4 electrons.
A. \(\mathrm{n}=3,l=2, \mathrm{~m}_{1}=1, \mathrm{~m}_{\mathrm{s}}=+1 / 2\)
B. \(\mathrm{n}=4,l=1, \mathrm{~m}_{1}=0, \mathrm{~m}_{\mathrm{s}}=+1 / 2\)
C. $$\mathrm{n}=4,l=2, \mathrm{~m}_...
A. \(\mathrm{n}=3,l=2, \mathrm{~m}_{1}=1, \mathrm{~m}_{\mathrm{s}}=+1 / 2\)
B. \(\mathrm{n}=4,l=1, \mathrm{~m}_{1}=0, \mathrm{~m}_{\mathrm{s}}=+1 / 2\)
C. $$\mathrm{n}=4,l=2, \mathrm{~m}_...
MCQ+4 / -12022
5Structure Of Atom
If the work function of a metal is 6.63 \(\times\) 10\(-\)19J, the maximum wavelength of the photon required to remove a photoelectron from the metal is ____________ nm. (Nearest integer)
[Given : h = 6.63 \(\times\) 10\(-\)34 J s, and c = ...
[Given : h = 6.63 \(\times\) 10\(-\)34 J s, and c = ...
INTEGER+4 / -12022
6Structure Of Atom
Consider the following statements :
(A) The principal quantum number 'n' is a positive integer with values of 'n' = 1, 2, 3, ...
(B) The azimuthal quantum number 'l' for a given 'n' (principal quantum number) can have values as 'l' = 0, 1, ...
(A) The principal quantum number 'n' is a positive integer with values of 'n' = 1, 2, 3, ...
(B) The azimuthal quantum number 'l' for a given 'n' (principal quantum number) can have values as 'l' = 0, 1, ...
MCQ+4 / -12022
7Structure Of Atom
Identify the incorrect statement from the following.
MCQ+4 / -12022
8Structure Of Atom
If the wavelength for an electron emitted from \(\mathrm{H}\)-atom is \(3.3 \times 10^{-10} \mathrm{~m}\), then energy absorbed by the electron in its ground state compared to minimum energy required for its escape from the atom, is _______...
INTEGER+4 / -12022
9Structure Of Atom
Given below are two statements: One is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\)
Assertion \(\mathbf{A}\) : Zero orbital overlap is an out of phase overlap.
Reason \(\mathbf{R}\) : It results du...
Assertion \(\mathbf{A}\) : Zero orbital overlap is an out of phase overlap.
Reason \(\mathbf{R}\) : It results du...
MCQ+4 / -12022
10Structure Of Atom
If the uncertainty in velocity and position of a minute particle in space are, 2.4 \(\times\) 10\(-\)26 (m s\(-\)1) and 10\(-\)7 (m) respectively. The mass of the particle in g is ____________. (Nearest integer)
(Given : h = 6.626 $$\times$...
(Given : h = 6.626 $$\times$...
INTEGER+4 / -12022
11Structure Of Atom
Consider the following set of quantum numbers.
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INTEGER+4 / -12022
12Structure Of Atom
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Energy of \(2 \mathrm{s}\) orbital of hydrogen atom is greater than that of \(2 \mathrm{s}\) orbital of lithium.
Reason R: En...
Assertion A: Energy of \(2 \mathrm{s}\) orbital of hydrogen atom is greater than that of \(2 \mathrm{s}\) orbital of lithium.
Reason R: En...
MCQ+4 / -12022
13Structure Of Atom
Outermost electronic configurations of four elements A, B, C, D are given below :
(A) \(3 s^{2}\)
(B) \(3 s^{2} 3 p^{1}\)
(C) \(3 s^{2} 3 p^{3}\)
(D) \(3 s^{2} 3 p^{4}\)
The correct order of first ionization enthalpy for them is :
(A) \(3 s^{2}\)
(B) \(3 s^{2} 3 p^{1}\)
(C) \(3 s^{2} 3 p^{3}\)
(D) \(3 s^{2} 3 p^{4}\)
The correct order of first ionization enthalpy for them is :
MCQ+4 / -12022
14Structure Of Atom
The correct decreasing order of energy for the orbitals having, following set of quantum numbers :
(A) n = 3, l = 0, m = 0
(B) n = 4, l = 0, m = 0
(C) n = 3, l = 1, m = 0
(D) n = 3, l = 2, m = 1
is :
(A) n = 3, l = 0, m = 0
(B) n = 4, l = 0, m = 0
(C) n = 3, l = 1, m = 0
(D) n = 3, l = 2, m = 1
is :
MCQ+4 / -12022
15Structure Of Atom
If the radius of the 3rd Bohr's orbit of hydrogen atom is r3 and the radius of 4th Bohr's orbit is r4. Then :
MCQ+4 / -12022
16Structure Of Atom
The number of radial and angular nodes in 4d orbital are, respectively
MCQ+4 / -12022
17Structure Of Atom
The wavelength of an electron and a neutron will become equal when the velocity of the electron is \(x\) times the velocity of neutron. The value of \(x\) is ____________. (Nearest Integer)
(Mass of electron is $$9.1 \times 10^{-31} \mathrm...
(Mass of electron is $$9.1 \times 10^{-31} \mathrm...
INTEGER+4 / -12022
18Structure Of Atom
Consider an imaginary ion \({ }_{22}^{48} \mathrm{X}^{3-}\). The nucleus contains '\(a\)'% more neutrons than the number of electrons in the ion. The value of 'a' is _______________. [nearest integer]
INTEGER+4 / -12022
19Structure Of Atom
The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x \(\times\) 10\(-\)8 m. The value of x is ___________. (Nearest Integer).
(Given : Energy of the electron in the first shell of...
(Given : Energy of the electron in the first shell of...
INTEGER+4 / -12022
20Structure Of Atom
The pair, in which ions are isoelectronic with AI3+ is :
MCQ+4 / -12022
21Structure Of Atom
The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is :
[Given : The threshold frequency of platinum is 1.3 \(\times\) 1015 s\(-\)1 and h = 6.6 \(\times\) 10\(-\)34 J s.]
[Given : The threshold frequency of platinum is 1.3 \(\times\) 1015 s\(-\)1 and h = 6.6 \(\times\) 10\(-\)34 J s.]
MCQ+4 / -12022
22Structure Of Atom
Which of the following sets of quantum numbers is not allowed?
MCQ+4 / -12022
23Structure Of Atom
When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number of emission lines observed are _____________.
INTEGER+4 / -12022
24Structure Of Atom
Consider the following pairs of electrons
(A) (a) n = 3, \(l\) = 1, m1 = 1, ms = + \({1 \over 2}\)
(b) n = 3, 1 = 2, m1 = 1, ms = + \({1 \over 2}\)
(B) (a) n = 3, \(l\) = 2, m1 = \(-\)2, ms = \(-\)\({1 \over 2}\)
(b) n = 3, $$l$...
(A) (a) n = 3, \(l\) = 1, m1 = 1, ms = + \({1 \over 2}\)
(b) n = 3, 1 = 2, m1 = 1, ms = + \({1 \over 2}\)
(B) (a) n = 3, \(l\) = 2, m1 = \(-\)2, ms = \(-\)\({1 \over 2}\)
(b) n = 3, $$l$...
MCQ+4 / -12022
25Structure Of Atom
The energy of one mole of photons of radiation of wavelength 300 nm is (Given : h = 6.63 \(\times\) 10\(-\)34 J s, NA = 6.02 \(\times\) 1023 mol\(-\)1, c = 3 \(\times\) 108 m s\(-\)1)
MCQ+4 / -12022