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Structure of Atom

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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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 Li2+ ion?...
NEET 2022
Identify the incorrect statement from the following.
NEET 2022
A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of...
NEET 2021
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?
NEET 2019
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
NEET 2019
Which one is a wrong statement?
NEET 2018
Which one is the wrong statement ?
NEET 2017
Two electrons occupying the same orbital are distinguished by
NEET 2016 Phase 1
Which of the following pairs of d-orbitals will have electron density along the axes ?
NEET 2016 Phase 2
How many electrons can fit in the orbital for which n = 3 and $$l$$ = 1?
NEET 2016 Phase 2
The angular momentum of electron in 'd' orbital is equal to
AIPMT 2015 Cancelled Paper
Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z = 22)
AIPMT 2015
The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following ? ...
AIPMT 2015 Cancelled Paper
Be2+ is isoelectronic with which of the following ions ?
AIPMT 2014
Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 $$ \times $$ 10$$...
AIPMT 2014
What is the maximum number of orbitals that can be identified with the following quantum numbers ? n = 3, l = 1, m1 = 0...
AIPMT 2014
According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as (h = 6.62 $$ \times $$ 10$$...
NEET 2013 (Karnataka)
The outer electronic configuration of Gd (At. No. 64) is
NEET 2013 (Karnataka)
The value of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s. The speed of light is 3 $$ \times $$ 1017 mm s$$-$$1...
NEET 2013
Based on equation E = $$-$$ 2.178 $$ \times $$ 10$$-$$18 J $$\left( {{{{Z^2}} \over {{n^2}}}} \right)$$, certain conclus...
NEET 2013
What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ? n = 3, $$l$...
NEET 2013
The orbital angular momentum of a p-electron is given as
AIPMT 2012 Mains
The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is
AIPMT 2012 Prelims
Maximum number of electrons in a subshell with $$l$$ = 3 and n = 4 is
AIPMT 2012 Prelims
According to the Bohr theory, which of the following transitions in the hydrogen atom will give rise to the least energe...
AIPMT 2011 Mains
If n = 6, the correct sequence for filling of electrons will be
AIPMT 2011 Prelims
The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., ...
AIPMT 2011 Prelims
The total number of atomic orbitals in fourth energy level of an atom is
AIPMT 2011 Prelims
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be (h = 6.6 $$ \times $$ 10$$-$$34 J s...
AIPMT 2010 Mains
Which of the following is not permissible arrangement of electrons in an atom ?
AIPMT 2009
Maximum number of electrons in a subshell of an atom is determined by the following
AIPMT 2009
If uncertainty in position and momentum are equal, then uncertainty in velocity is
AIPMT 2008
The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 $$ \times $$...
AIPMT 2008
Consider the following sets of quantum numbers : .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg td{...
AIPMT 2007
Given : The mass of electron is 9.11 $$ \times $$ 10$$-$$31 kg, Planck constant is 6.626 $$ \times $$ 10$$-$$34 J s, the...
AIPMT 2006
The orientation of an atomic orbital is governed by
AIPMT 2006
The energy of second Bohr orbit of the hydrogen atom is $$-$$328 kJ mol$$-$$1; hence the energy of fourth Bohr orbit wou...
AIPMT 2005
The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in hydrogen atom will be (Given ionizatio...
AIPMT 2004
The velocity of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s. The velocity of light is 3.0 $$ \times $$ 108 m ...
AIPMT 2003
In hydrogen atom, energy of first excited state is $$-$$ 3.4 eV. Then find out K.E. of same orbit of hydrogen atom
AIPMT 2002
The following quantum numbers are possible for how many orbitals : n = 3, $$l$$ = 2, m = +2 ?
AIPMT 2001
Main axis of a diatomic molecule is z, molecular orbital px and py overlap to from which of the following orbitals. ...
AIPMT 2001
Isoelectronic species are
AIPMT 2000
For given energy, E = 3.03 $$ \times $$ 10$$-$$19 Joules corresponding wavelength is (h = 6.626 $$ \times $$ 10$$-$$34 ...
AIPMT 2000

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