Atomic Structure Test | Atomic Structure Online Mock Test Set 1

1. ___________would has the maximum de Broglie wavelength?
Proton
Neutron
α - particle
β - particle


2. de Broglie equation is
λ = mv / h
λ = hmv
λ = hv / m
λ = h / mv


3. Dual character of an electron was explained by
Bohr
Heisenberg
de Broglie
Pauli


4. En = – 313.6 / n2, If the value of En = – 34.84 to which value ‘n’ corresponds to
4
3
2
1


5. Energy levels of molecular orbitals have been determined experimentally by
Spectroscopic studies
X - ray diffraction
Crystallographic studies
None of these


6. If the energy of an electron in the second Bohr orbit of H - atom is – E, what is the energy of the electron in the Bohr's first orbit?
2E
- 4E
- 2E
4E


7. In a molecule eight electrons are present in bonding molecular orbital and four electrons are present in anti-bonding molecular orbital. Its bond order is
3
1
2.5
2


8. Inter-molecular hydrogen bonding is present in
HF
H2O
ethanol
all of these


9. Intramolecular hydrogen bonding is present in
o - nitrophenol
m - nitrophenol
p - nitrophenol
p - aminophenol


10. Molecular orbital with the least energy is
 σ1s
σ*1s
π2py
π *2py


11. Number of spherical nodes in 2s orbital is
1
2
3
4


12. The bond order of nitrogen molecule is
2.5
3
2
4


13. The bond order of oxygen molecule is
2.5
1
3
2


14. The circumference of the circular orbit of an electron is an integral multiple of its
frequency
momentum
mass
wavelength


15. The nature of hybridisation in IF7 molecule is
sp3d
sp3d2
sp3
sp3d3


16. The hybridisation in CO32– ion is
sp2
sp3
sp
sp3d


17. The hybridisation in ICl4– ion is
sp3
sp3d
sp3d2
sp3d3


18. The hybridisation in PCl5 molecule is
sp3d2
sp3d
sp3
sp2


19. The hybridisation in SF6 molecule is
sp3
sp3d
sp3d2
sp3d3


20. The hybridisation in SO42– ion is
sp3
sp3d2
sp3d
sp3d3


21. The hybridisation involved in XeF6 is
sp3d3
sp3d2
sp3d
sp3


22. The momentum of a particle which has de-Broglie wavelength of 1 Å (h = 6.626 x 10–34 kgm2s^–1)
6.63 x 10–23kgms–1
6.63 x 10–24 kgms–1
6.63 x 10–34 kgms–1
6.63 x 1034 kgms–1


23. The hybridisation in NH4⁺  ion is
sp
sp2
sp3
sp3d


24. Which of the following particles having same kinetic energy?
α - particle
proton
β - particle
neutron


25. Which one of the following experiments confirmed the wave nature of electron?
G.P. Thomson's gold foil experiment
Black body radiation
Photoelectric effect
Millikan's oil-drop experiment


26. Water exists in liquid state. This is due to
high boiling point
low boiling point
freezing point is zero
hydrogen bond


27. Inter molecular hydrogen bonding is present in
o - nitrophenol
salicylic acid
o - hydroxy benzaldehyde
hydrogen fluoride


28. The energy of electron in an atom is given by En =
− 4π2me4 / n2h2
− 2π2me2 / n2h2
− 2π2me4 / n2h2
− 2πme4 / n2h2


29. The molecular orbitals are filled according to
Pauli’s exclusion principle
Hund’s rule
Aufbau principle
All the above


30. Which of the following is paramagnetic?
H2
He2
N2
O2


31. The value of Bohr radius for hydrogen atom is
0.529 x 10–8 cm
0.529 x 10–10 cm
0.529 x 10–6 cm
0.529 x 10–12 cm


32. In a molecule when Nb = 8 and Na = 2 then the bond order is
3
4
2.5
2


33. Shape of p-orbital is
spherical
clover leaf
dumb-bell
doughnut


34. Which of the following particle having same kinetic energy, would have the maximum de-Broglie wave length?
α - particle
proton
β - particle
neutron


35. Which molecule is relatively more stable?
O2
H2
Li2
N2


36. The bond order of Hydrogen molecule is
0
1
3
2


37. The bond order of Lithium molecule is
2
1
0
3


38. The total valence electrons in BeCl2
18
12
16
14


39. The charge of an electron is determined by
Thomson
de-Broglie
Milliken
Einstein


40. The hybridisation in XeOF4 molecule is
sp3
sp3d2
sp3d
sp3d3


41. sp2 hybridization is not present in ____________
CO32 –
SO42 –
NO3–
NO2–

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