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JEE Questions for Chemistry Structure Of Atom Quiz 11 - MCQExams.com
JEE
Chemistry
Structure Of Atom
Quiz 11
For the electronic transition from n = 2 to n = 1 which one of the following will produce shortest wave length?
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H atom
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D atom
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He+ ion
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Li2+ion
For a certain particle, it is found that uncertainty 1840 in velocity is reciprocal of uncertainty in position This implies that
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Mass of the particle is > unity
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Mass of the particle is unity
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Mass of the particle ≤ h
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Mass of the particle ≥ h / 4π
For particles having same KE., the de-broglie wavelength is
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Directly proportional to its velocity,
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Inversely proportional to its velocity
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Independent of its mass and velocity
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Unpredictable
Which of the expression given below gives IE of H atoms in terms of Rydberg’s constant (R
H
)?
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RH.hc
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RH.NA.hc
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RH(2hc)
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RH.c
If numerical value of mass and velocity are equal then de-Broglie wave length in terms of K.E. is
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2)
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both correct
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none
If uncertainty in position and velocity are equal then uncertainty in momentum will be
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2)
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How fast an electron is moving if it has a wavelength equal to the distance it travel in one second?
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If uncertainties in the measurement of position and momentum are equal, the uncertainty in the measurement of velocity is
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2)
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none of these
Energy equivalent of 10.00 cm
–1
is
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2)
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all are correct
The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of He
+
is
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2)
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The energy of hydrogen atom in its ground state is –13·6 eV. The energy of the level corresponding to the quantum number n = 5 is
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“0·54 eV
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“5·40 eV
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“0·85 eV
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“2·72 eV
The ground state configuration of Fe
3+
ion in gaseous state is: (At. No. of Fe = 26}
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2)
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Which of the following expressions gives the de – Broglie relationship ?
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2)
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1·05 × 10–28 m
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1·05 × 10–26 m
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5·27 × 10–30 m
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5·25 ×10–28 m
If the radius of first Bohr orbit be a
0
, then the radius of third Bohr orbit would be
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3 × a0
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6 × a0
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9 × a0
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1/9 × a0
The de – Broglie wavelength associated with ball of mass 200 g and moving at a speed of 5 m hour
–1
is of the order of (h = 6·625 x 10
–34
Js)
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10–15 m
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10–20 m
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10–30 m
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10–25 m
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zero
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0%
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2)
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Among the following series of transition metal ions, the one where all metal ions have same 3d electronic configuration is
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2)
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For d-electron, the orbital angular momentum is
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2)
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Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is
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2)
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The energy of second Bohr orbit of the hydrogen atom is –328 kJ mol
–1
, hence the energy of fourth Bohr orbit would be
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–41 kJ mol–1
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–1312 kJ mol–1
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–164 kJ mol–1
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–82 kJ mol–1
The correct order of number of unpaired electrons in the ions Cu
2+
, Ni
2+
, Fe
3+
and Cr
3+
is
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2)
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Ground state electronic configuration of nitrogen atom can be represented by
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2)
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Which one of the following sets of quantum number represent an impossible arrangement ?
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2)
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The orbital diagram in which Aufbau principle is violated is
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2)
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2)
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The electrons, identified by quantum number n and (i) n = 4,
l
= 1 (ii) n = 4,
l
= 0 (iii) n = 3,
l
= 2 (iv) n = 3,
l
= 1 can be placed in order of increasing energy, from the lowest to highest, as
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(iv) < (ii) < (iii) < (i)
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(ii)< (iv) < (i) < (iii)
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(i) < (iii) < (ii) < (iv)
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(iii) < (i) < (iv) < (ii)
The wave length associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order
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10–10 m
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10–20 m
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10–30 m
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10–40 m
If the nitrogen atom had electronic configuration 1s
7
, it would have energy lower than that of the normal ground state configuration 1s
2
, 2s
2
, 2p
3
because the electrons would be closer to the nucleus. Yet, 1s
7
is not observed because it violates.
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Heisenberg uncertainty principle
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Hund’s rule
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Pauli’s exclusion principle
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Bohr postulates of stationary orbits
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