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Chemistry
List of top Chemistry Questions on Structure of atom asked in NEET (UG)
The following quantum numbers are possible for how many orbital(s) $n = 3$ ,$l = 2$ and $m = +2$ are possible ?
NEET (UG) - 2001
NEET (UG)
Chemistry
Structure of atom
Mn and Mp represet the mass of neutron and proton respectively. An element having mass M has N neutron and Z-protons, then the correct relation will be
NEET (UG) - 2001
NEET (UG)
Chemistry
Structure of atom
Which rays contain (+ Ve) charged particle
NEET (UG) - 2001
NEET (UG)
Chemistry
Structure of atom
Isoelectronic species are:
NEET (UG) - 2000
NEET (UG)
Chemistry
Structure of atom
Maximum frequency of emission is obtained for the transition:
NEET (UG) - 2000
NEET (UG)
Chemistry
Structure of atom
The life span of atomic hydrogen is:
NEET (UG) - 2000
NEET (UG)
Chemistry
Structure of atom
For given energy, corresponding wavelength will be E=3.03×10
–19
Joules(h=6.6×10
–34
J.sec., C=3×10
8
m/sec.)
NEET (UG) - 2000
NEET (UG)
Chemistry
Structure of atom
The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is
NEET (UG) - 1999
NEET (UG)
Chemistry
Structure of atom
Who modified Bohr's theory by introducing elliptical orbits for electron path?
NEET (UG) - 1999
NEET (UG)
Chemistry
Structure of atom
The uncertainty in momentum of an electron is
$1\times 10^{-5} kg m/s.$
The uncertainty in its position will be (Given,
$h = 6.62 \times 10^{-34} kg m^2/s)$
NEET (UG) - 1999
NEET (UG)
Chemistry
Structure of atom
The momentum of a particle having a de-Broglie wavelength of
$10^{17}$
m is (Given,
$h = 6.625 \times 10^{-34}$
m)
NEET (UG) - 1996
NEET (UG)
Chemistry
Structure of atom
What will be the longest wavelength line in Balmer series of spectrum?
NEET (UG) - 1996
NEET (UG)
Chemistry
Structure of atom
Uncertainty in position of an electron (mass of an electron is =
$9.1\times10^{-28}g)$
moving with a velocity of
$3 \times 10 ^4$
cm/s accurate upto 0.001% will be (use
$\frac{h}{4\pi}$
in uncertainty expression where
$h = 6.626 \times 10^{-27}$
erg s)
NEET (UG) - 1995
NEET (UG)
Chemistry
Structure of atom
The radius of hydrogen atom in the ground state is 0.53
$\mathring{A}.$
The radius of
$Li^{2+}$
ion (at. no. = 3) in a similar state is
NEET (UG) - 1995
NEET (UG)
Chemistry
Structure of atom
The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will occur in the absorption spectrum?
NEET (UG) - 1995
NEET (UG)
Chemistry
Structure of atom
The electronic configuration of an element is $1s^2,2s^2 2p^6,3s^2 3p^3$. What is the atomic number of the element, which is present just below the above element in the periodic table?
NEET (UG) - 1995
NEET (UG)
Chemistry
Structure of atom
In the photoelectron emission, the energy of the emitted electron is
NEET (UG) - 1994
NEET (UG)
Chemistry
Structure of atom
Which of the following is never true for cathode rays?
NEET (UG) - 1994
NEET (UG)
Chemistry
Structure of atom
If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for
$He^+$
will be
NEET (UG) - 1993
NEET (UG)
Chemistry
Structure of atom
The energy of an electron in the
$nth$
Bohr orbit of H - atom is
NEET (UG) - 1992
NEET (UG)
Chemistry
Structure of atom
Electronic configuration of calcium atom can be written as
NEET (UG) - 1992
NEET (UG)
Chemistry
Structure of atom
The electronic configuration of Cu (at.no. = 29) is
NEET (UG) - 1991
NEET (UG)
Chemistry
Structure of atom
The order of filling of electrons in the orbitals of an atom will be
NEET (UG) - 1991
NEET (UG)
Chemistry
Structure of atom
The maximum number of electrons, present in an orbit that is represented by azimuthal quantum number
$(l)=3$
, will be
NEET (UG) - 1991
NEET (UG)
Chemistry
Structure of atom
In a given atom no two electrons can have the same values of all the four quantum numbers. This is called
NEET (UG) - 1991
NEET (UG)
Chemistry
Structure of atom
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