Structure of Atom PYQs - Last 10 Years
JEE Main / Chemistry / Physical Chemistry / 190 recent questions
ChemistryPhysical Chemistry2017-2026
Practice 190 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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2017-2026
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Last 10 Years Structure of Atom Questions
Showing 40 of 190 filtered questions.
1Structure Of Atom
The number of orbitals with n = 5, m1 = +2 is ___________. (Round off to the Nearest Integer).
INTEGER+4 / -12021
2Structure Of Atom
The de Broglie wavelength of an electron in the
4th Bohr orbit is :
4th Bohr orbit is :
MCQ+4 / -12020
3Structure Of Atom
For the Balmer series in the spectrum of H atom,
\(\overline \nu = {R_H}\left\{ {{1 \over {n_1^2}} - {1 \over {n_2^2}}} \right\}\), the correct statements among (I) to (IV)
are :
(I) As wavelength decreases, the lines in the series conver...
\(\overline \nu = {R_H}\left\{ {{1 \over {n_1^2}} - {1 \over {n_2^2}}} \right\}\), the correct statements among (I) to (IV)
are :
(I) As wavelength decreases, the lines in the series conver...
MCQ+4 / -12020
4Structure Of Atom
The radius of the second Bohr orbit, in terms
of the Bohr radius, a0, in Li2+ is :
of the Bohr radius, a0, in Li2+ is :
MCQ+4 / -12020
5Structure Of Atom
Hydrogen has three isotopes (A), (B) and (C).
If the number of neutron(s) in (A), (B) and (C)
respectively, are (x), (y) and (z), the sum of (x),
(y) an (z) is :
If the number of neutron(s) in (A), (B) and (C)
respectively, are (x), (y) and (z), the sum of (x),
(y) an (z) is :
MCQ+4 / -12020
6Structure Of Atom
The number of orbitals associated with quantum number n = 5, ms = +\({1 \over 2}\) is :
MCQ+4 / -12020
7Structure Of Atom
The difference between the radii of 3rd and 4th
orbits of Li2+ is R1
. The difference between the
radii of 3rd and 4th orbits of He+ is
\(\Delta\)R2
. Ratio \(\Delta\)R1 : \(\Delta\)R2 is :
orbits of Li2+ is R1
. The difference between the
radii of 3rd and 4th orbits of He+ is
\(\Delta\)R2
. Ratio \(\Delta\)R1 : \(\Delta\)R2 is :
MCQ+4 / -12020
8Structure Of Atom
The correct statement about probability density (except at infinite distance from nucleus) is :
MCQ+4 / -12020
9Structure Of Atom
The region in the electromagnetic spectrum
where the Balmar series lines appear is :
where the Balmar series lines appear is :
MCQ+4 / -12020
10Structure Of Atom
The shortest wavelength of H atom in the
Lyman series is \(\lambda\)1. The longest wavelength in
the Balmar series of He+ is :
Lyman series is \(\lambda\)1. The longest wavelength in
the Balmar series of He+ is :
MCQ+4 / -12020
11Structure Of Atom
Consider the hypothetical situation where the
azimuthal quantum number,
\(l\), takes values 0,
1, 2, ....., n + 1, where n is the principal
quantum number. Then, the element with
atomic number :
azimuthal quantum number,
\(l\), takes values 0,
1, 2, ....., n + 1, where n is the principal
quantum number. Then, the element with
atomic number :
MCQ+4 / -12020
12Structure Of Atom
The figure that is not a direct manifestation of
the quantum nature of atoms is :
the quantum nature of atoms is :
MCQ+4 / -12020
13Structure Of Atom
The number of subshells associated with n = 4
and m = –2 quantum numbers is
and m = –2 quantum numbers is
MCQ+4 / -12020
14Structure Of Atom
The work function of sodium metal is
4.41 \(\times\) 10–19 J. If photons of wavelength 300 nm
are incident on the metal, the kinetic energy of
the ejected electrons will be (h = 6.63 \(\times\) 10–34 J s;
c = 3 \(\times\) 108 m/s) ___...
4.41 \(\times\) 10–19 J. If photons of wavelength 300 nm
are incident on the metal, the kinetic energy of
the ejected electrons will be (h = 6.63 \(\times\) 10–34 J s;
c = 3 \(\times\) 108 m/s) ___...
INTEGER+4 / -02020
15Structure Of Atom
The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is :
MCQ+4 / -12019
16Structure Of Atom
For emission line of atomic hydrogen from ni = 8 to nf = n, the plot of wave number \(\left( {\overline v } \right)\) against \(\left( {{1 \over {{n^2}}}} \right)\) will be (The Rydberg constant, RH is in wave number unit)
MCQ+4 / -12019
17Structure Of Atom
Which of the following combination of statements is true regarding the interpretation of the atomic orbitals ?
(a) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angu...
(a) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angu...
MCQ+4 / -12019
18Structure Of Atom
For any given series of spectral lines of atomic
hydrogen, let \(\Delta \mathop v\limits^\_ =\) \(\Delta {\overline v _{\max }} - \Delta {\overline v _{\min }}\) be the difference
in maximum and minimum frequencies in
cm–1. The ratio Lyma...
hydrogen, let \(\Delta \mathop v\limits^\_ =\) \(\Delta {\overline v _{\max }} - \Delta {\overline v _{\min }}\) be the difference
in maximum and minimum frequencies in
cm–1. The ratio Lyma...
MCQ+4 / -12019
19Structure Of Atom
Which one of the following about an electron
occupying the 1s orbital in a hydrogen atom is
incorrect ? (The Bohr radius is represented
by a0)
occupying the 1s orbital in a hydrogen atom is
incorrect ? (The Bohr radius is represented
by a0)
MCQ+4 / -12019
20Structure Of Atom
The quantum number of four electrons are given below :
n = 4, l = 2, ml =–2, ms = –1/2
n = 3, l = 2, ml = 1, ms = +1/2
n = 4, l = 1, ml = 0, ms = +1/2
n = 3, l = 1, ml = 1, ms = –1/2
The correct order of their increasing enegies will be :
n = 4, l = 2, ml =–2, ms = –1/2
n = 3, l = 2, ml = 1, ms = +1/2
n = 4, l = 1, ml = 0, ms = +1/2
n = 3, l = 1, ml = 1, ms = –1/2
The correct order of their increasing enegies will be :
MCQ+4 / -12019
21Structure Of Atom
If p is the momentum of the fastest electron
ejected from a metal surface after the irradiation
of light having wavelength \(\lambda\), then for 1.5 p
momentum of the photoelectron, the
wavelength of the light should be:
(Assume kinetic en...
ejected from a metal surface after the irradiation
of light having wavelength \(\lambda\), then for 1.5 p
momentum of the photoelectron, the
wavelength of the light should be:
(Assume kinetic en...
MCQ+4 / -12019
22Structure Of Atom
What is the work function of the metal if the light of wavelength 4000\(\mathop A\limits^ \circ\) generates photoelectrons of velocity 6 \(\times\) 105 ms–1 from it ?
(Mass of electron = 9 \(\times\) 10–31 kg;
Velocity of light = 3 ...
(Mass of electron = 9 \(\times\) 10–31 kg;
Velocity of light = 3 ...
MCQ+4 / -12019
23Structure Of Atom
The upper stratosphere consisting of the ozone layer protects us from sun's radiation that falls in the wavelength region of -
MCQ+4 / -12019
24Structure Of Atom
If the de Broglie wavelength of the electron in nth Bohr orbit in a hydrogenic atom is equal to 1.5 \(\pi\)a0 (a0 is Bohr radius), then the value of n/z is -
MCQ+4 / -12019
25Structure Of Atom
The group number, number of valence electrons, and valency of an element with atomic number 15,
respectively, are:
respectively, are:
MCQ+4 / -12019
26Structure Of Atom
The electrons are more likely to be found :
MCQ+4 / -12019
27Structure Of Atom
Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for this purpose?
[RH = 1 \(\times\) 105 cm–1, h = 6.6 \(\times\) 10–34 Js, c = 3 \(\times\) 108 ms–1]
[RH = 1 \(\times\) 105 cm–1, h = 6.6 \(\times\) 10–34 Js, c = 3 \(\times\) 108 ms–1]
MCQ+4 / -12019
28Structure Of Atom
The de Broglie wavelength (\(\lambda\)) associated with a photoelectron varies with the frequency (v) of the incident radiation as, [v0 is threshold frequency] :
MCQ+4 / -12019
29Structure Of Atom
Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal surface ?
MCQ+4 / -12019
30Structure Of Atom
The ground state energy of hydrogen atom is – 13.6 eV. The energy of second excited state of He+ ion in eV is :
MCQ+4 / -12019
31Structure Of Atom
The graph between \({\left| \psi \right|^2}\) and r (radial distance) is shown below. This represents :
MCQ+4 / -12019
32Structure Of Atom
The isoelectronic set of ions is :
MCQ+4 / -12019
33Structure Of Atom
The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The
spectral series are :
spectral series are :
MCQ+4 / -12019
34Structure Of Atom
Which of the following statements is false ?
MCQ+4 / -12018
35Structure Of Atom
Ejection of the photoelectron from metal in the photoelectric experiment can be stopped by applying 0.5 V when the radiation of 250 nm is used. The work function of the metal is :
MCQ+4 / -12018
36Structure Of Atom
The de-Broglie's wavelength of electron present in first Bohr orbit of 'H' atom is :
MCQ+4 / -12018
37Structure Of Atom
The electron in the hydrogen atom undergoes transition from higher orbitals
to orbital of radius 211.6 pm. This transition is associated with :
to orbital of radius 211.6 pm. This transition is associated with :
MCQ+4 / -12017
38Structure Of Atom
If the shortest wavelength in Lyman series of hydrogen atom is A, then the longest wavelength in Paschen series of He+ is :
MCQ+4 / -12017
39Structure Of Atom
The radius of the second Bohr orbit for hydrogen atom is:
(Planck’s Const. h = 6.6262 × 10-34 Js; mass of electron = 9.1091 × 10-31 kg; charge of electron (e) = 1.60210 × 10-19 C; permittivity of vacuum (\({\varepsilon _0}\)) = 8.854185 × 1...
(Planck’s Const. h = 6.6262 × 10-34 Js; mass of electron = 9.1091 × 10-31 kg; charge of electron (e) = 1.60210 × 10-19 C; permittivity of vacuum (\({\varepsilon _0}\)) = 8.854185 × 1...
MCQ+4 / -12017
40Structure Of Atom
The group having isoelectronic species is:
MCQ+4 / -12017