JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank

done Topic Test - Structure of Atom (4-5-21) Total Questions - 40

• question_answer1)
  Positive ions are formed from the neutral atom by the
  A)
  Increase of nuclear charge done clear
  B)
  Gain of protons done clear
  C)
  Loss of electrons done clear
  D)
  Loss of protons done clear
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• question_answer2)
  The size of nucleus is measured in
  A)
  amu done clear
  B)
  Angstrom done clear
  C)
  Fermi done clear
  D)
  cm done clear
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• question_answer3)
  The average distance of an electron in an atom from its nucleus is of the order of                   
  A)
  \[{{10}^{6}}m\] done clear
  B)
  \[{{10}^{-6}}m\] done clear
  C)
  \[{{10}^{-10}}m\] done clear
  D)
  \[{{10}^{-15}}m\] done clear
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• question_answer4)
  If W is atomic weight and N is the atomic number of an element, then                      
  A)
  Number of \[{{e}^{-1}}=W-N\] done clear
  B)
  Number of \[_{0}{{n}^{1}}=W-N\] done clear
  C)
  Number of \[_{1}{{H}^{1}}=W-N\] done clear
  D)
  Number of \[_{0}{{n}^{1}}=N\] done clear
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• question_answer5)
  Which of the following particles has more electrons than neutrons
  A)
  \[C\] done clear
  B)
  \[{{F}^{-}}\] done clear
  C)
  \[{{O}^{-2}}\] done clear
  D)
  \[A{{l}^{+3}}\] done clear
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• question_answer6)
  The nucleus of the element \[_{21}{{E}^{45}}\] contains
  A)
  45 protons and 21 neutrons done clear
  B)
  21 proto.ns and 24 neutrons done clear
  C)
  21 protons and 45 neutrons done clear
  D)
  24 protons and 21 neutrons done clear
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• question_answer7)
  The nitrogen atom has 7 protons and 7 electrons, the nitride ion \[({{N}^{3-}})\]will have                 
  A)
  7 protons and 10 electrons done clear
  B)
  4 protons and 7 electrons done clear
  C)
  4 protons and 10 electrons done clear
  D)
  10 protons and 7 electrons done clear
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• question_answer8)
  When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because
  A)
  The force of repulsion on the moving alpha particle is small done clear
  B)
  The force of attraction on the alpha particle to the oppositely charged electrons is very small done clear
  C)
  There is only one nucleus and large number of electrons done clear
  D)
  The nucleus occupies much smaller volume compared to the volume of the atom done clear
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• question_answer9)
  When \[\beta \]-particles are sent through a tin metal foil, most of them go straight through the foil as
  A)
  \[\beta \]-particles are much heavier than electrons done clear
  B)
  \[\beta \]-particles are positively charged done clear
  C)
  Most part of the atom is empty space done clear
  D)
  \[\beta \]-particles move with high velocity done clear
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• question_answer10)
  The radius of the nucleus is related to the mass number \[A\]  by
  A)
  \[R={{R}_{o}}{{A}^{1/2}}\] done clear
  B)
  \[R={{R}_{o}}A\] done clear
  C)
  \[R={{R}_{o}}{{A}^{2}}\] done clear
  D)
  \[R={{R}_{o}}{{A}^{1/3}}\]  done clear
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• question_answer11)
  The mass of a photon with a wavelength equal to \[1.54\times {{10}^{-8}}cm\] is                           
  A)
  \[0.8268\times {{10}^{-34}}kg\] done clear
  B)
  \[1.2876\times {{10}^{-33}}kg\] done clear
  C)
  \[1.4285\times {{10}^{-32}}kg\] done clear
  D)
  \[1.8884\times {{10}^{-32}}kg\] done clear
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• question_answer12)
  Which of the following transitions have minimum wavelength                                   
  A)
  \[{{n}_{4}}\to {{n}_{1}}\] done clear
  B)
  \[{{n}_{2}}\to {{n}_{1}}\] done clear
  C)
  \[{{n}_{4}}\to {{n}_{2}}\] done clear
  D)
  \[{{n}_{3}}\to {{n}_{1}}\] done clear
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• question_answer13)
  What will be de-Broglie wavelength of an electron moving with a velocity of \[1.2\times {{10}^{5}}\,m{{s}^{-1}}\]  
  A)
  \[6.068\times {{10}^{-9}}\] done clear
  B)
  \[3.133\times {{10}^{-37}}\] done clear
  C)
  \[6.626\times {{10}^{-9}}\] done clear
  D)
  \[6.018\times {{10}^{-7}}\] done clear
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• question_answer14)
  The de-Broglie equation applies    
  A)
  To electrons only done clear
  B)
  To neutrons only done clear
  C)
  To protons only done clear
  D)
  All the material object in motion done clear
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• question_answer15)
  The possibility of finding an electron in an orbital was conceived by                          
  A)
  Rutherford done clear
  B)
  Bohr done clear
  C)
  Heisenberg done clear
  D)
  Schrodinger done clear
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• question_answer16)
  For an electron if the uncertainty in velocity is    \[\Delta \nu \], the uncertainty in its position \[(\Delta x)\] is given by
  A)
   \[\frac{hm}{4\pi \Delta \nu }\] done clear
  B)
  \[\frac{4\pi }{hm\Delta \nu }\] done clear
  C)
  \[\frac{h}{4\pi m\Delta \nu }\] done clear
  D)
  \[\frac{4\pi \ m}{h\ .\ \Delta \nu }\] done clear
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• question_answer17)
  The electronic configuration of silver atom in ground state is
  A)
  \[[Kr]3{{d}^{10}}\,4{{s}^{1}}\] done clear
  B)
  \[[Xe]\,4{{f}^{14}}5{{d}^{10}}6{{s}^{1}}\] done clear
  C)
  \[[Kr]\,4{{d}^{10}}5{{s}^{1}}\] done clear
  D)
  \[[Kr]\,4{{d}^{9}}5{{s}^{2}}\] done clear
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• question_answer18)
  The number of electrons in the valence shell of calcium is
  A)
  6 done clear
  B)
  8 done clear
  C)
  2 done clear
  D)
  4 done clear
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• question_answer19)
  The number of radial nodes of 3s and 2p orbitals are respectively.
  A)
  2, 0 done clear
  B)
  0, 2 done clear
  C)
  1, 2 done clear
  D)
  2, 1 done clear
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• question_answer20)
  Ions which have the same electronic configuration are those of
  A)
  Lithium and sodium        done clear
  B)
  Sodium and potassium done clear
  C)
  Potassium and calcium    done clear
  D)
  Oxygen and chlorine done clear
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• question_answer21)
  If an electron has spin quantum number of \[+\frac{1}{2}\] and a magnetic quantum number of \[-1\], it cannot be presented in an    
  A)
  \[d\]-orbital done clear
  B)
  \[f\]-orbital done clear
  C)
  \[p\]-orbital done clear
  D)
  \[s\]-orbital done clear
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• question_answer22)
  What is the electronic configuration of \[C{{u}^{2+}}(Z=29)\] of least position       
  A)
  \[[Ar]\,4{{s}^{1}}3{{d}^{8}}\] done clear
  B)
  \[[Ar]\,4{{s}^{2}}3{{d}^{10}}4{{p}^{1}}\] done clear
  C)
  \[[Ar]\,4{{s}^{1}}3{{d}^{10}}\] done clear
  D)
  \[[Ar]\,3{{d}^{9}}\] done clear
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• question_answer23)
  Which of the following set of quantum numbers is possible
  A)
  \[n=3;\,\,l=2;\,\,m=2\] and \[s=+\frac{1}{2}\] done clear
  B)
  \[n=3;\,\,l=4;\,\,m=0\] and \[s=-\frac{1}{2}\] done clear
  C)
  \[n=4;\,l=0;\,\,m=2\] and \[s=+\frac{1}{2}\] done clear
  D)
  \[n=4;\,\,l=4;\,\,m=3\] and \[s=+\frac{1}{2}\] done clear
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• question_answer24)
  Which of the following sets of quantum numbers is correct for an electron in \[4f\] orbital
  A)
  \[n=4,\,l=3,\,m=+1,\,s=+\frac{1}{2}\] done clear
  B)
  \[n=4,\,l=4,\,m=-4,\,s=-\frac{1}{2}\] done clear
  C)
  \[n=4,\,l=3,\,m=+4,\,s=+\frac{1}{2}\] done clear
  D)
  \[n=3,\,l=2,\,m=-2,\,s=+\frac{1}{2}\] done clear
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• question_answer25)
  The maximum number of electrons which each sub-shell can occupy is                                 
  A)
  \[2{{n}^{2}}\] done clear
  B)
  \[2n\] done clear
  C)
  \[2(2l+1)\] done clear
  D)
  \[(2l+1)\] done clear
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• question_answer26)
  The energy of an electron of \[2{{p}_{y}}\] orbital is         
  A)
  Greater than that of \[2{{p}_{x}}\] orbital done clear
  B)
  Less than that of \[2{{p}_{x}}\] orbital done clear
  C)
  Equal to that of \[2s\] orbital done clear
  D)
  Same as that of \[2{{p}_{z}}\] orbital done clear
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• question_answer27)
  Orbital angular momentum for a d-electron is
  A)
  \[\frac{6h}{2\pi }\]         done clear
  B)
  \[\frac{\sqrt{6}\,h}{2\pi }\] done clear
  C)
  \[\frac{12h}{2\pi }\]       done clear
  D)
  \[\frac{\sqrt{12}\,h}{2\pi }\] done clear
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• question_answer28)
  Which is correct statement about proton
  A)
  Proton is nucleus of deuterium done clear
  B)
  Proton is ionized hydrogen molecule done clear
  C)
  Proton is ionized hydrogen atom done clear
  D)
  Proton is \[\alpha \]-particle done clear
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• question_answer29)
  The proton and neutron are collectively called as
  A)
  Deutron done clear
  B)
  Positron done clear
  C)
  Meson done clear
  D)
  Nucleon done clear
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• question_answer30)
  An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be
  A)
  26 done clear
  B)
  30 done clear
  C)
  36 done clear
  D)
  56 done clear
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• question_answer31)
  The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is
  A)
  17 done clear
  B)
  37 done clear
  C)
  2 done clear
  D)
  38 done clear
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• question_answer32)
  Which among the following species have the same number of electrons in its outermost as well as penultimate shell
  A)
  \[M{{g}^{2+}}\] done clear
  B)
  \[{{O}^{2-}}\] done clear
  C)
  \[{{F}^{-}}\] done clear
  D)
  \[C{{a}^{2+}}\] done clear
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• question_answer33)
  Experimental evidence for the existence of the atomic nucleus comes from                
  A)
  Millikan's oil drop experiment done clear
  B)
  Atomic emission spectroscopy done clear
  C)
  The magnetic bending of cathode rays done clear
  D)
  Alpha scattering by a thin metal foil done clear
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• question_answer34)
  If electron falls from \[n=3\] to \[n=2\], then emitted energy is         
  A)
  \[10.2eV\] done clear
  B)
  \[12.09eV\] done clear
  C)
  \[1.9eV\] done clear
  D)
  \[0.65eV\] done clear
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• question_answer35)
  Wavelength of spectral line emitted is inversely proportional to                     
  A)
  Radius done clear
  B)
  Energy done clear
  C)
  Velocity done clear
  D)
  Quantum number done clear
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• question_answer36)
  What is the de-Broglie wavelength associated with the hydrogen electron in its third orbit         
  A)
  \[9.96\times {{10}^{-10}}cm\] done clear
  B)
  \[9.96\times {{10}^{-8}}cm\] done clear
  C)
  \[9.96\times {{10}^{4}}cm\]     done clear
  D)
  \[9.96\times {{10}^{8}}cm\] done clear
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• question_answer37)
  If uncertainty in the position of an electron is zero, the uncertainty in its momentum would be
  A)
  Zero done clear
  B)
  \[<\frac{h}{2\lambda }\] done clear
  C)
  \[>\frac{h}{2\lambda }\] done clear
  D)
  Infinite done clear
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• question_answer38)
  The two electrons in K sub-shell will differ in
  A)
  Principal quantum number done clear
  B)
  Azimuthal quantum number done clear
  C)
  Magnetic quantum number done clear
  D)
  Spin quantum number done clear
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• question_answer39)
  The angular momentum of an electron depends on
  A)
  Principal quantum number done clear
  B)
  Azimuthal quantum number done clear
  C)
  Magnetic quantum number done clear
  D)
  All of these done clear
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• question_answer40)

  In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields

  (1) \[n=1,\,l=0,\,m=0\]

  (2) \[n=2,\,l=0,\,m=0\]

  (3) \[n=2,\,l=1,\,m=1\]

  (4) \[n=3,\,l=2,\,m=0\]

  (5) \[n=3,\,l=2,\,m=0\]

  A)
  (1) and (2) done clear
  B)
  (2) and (3) done clear
  C)
  (3) and (4) done clear
  D)
  (4) and (5) done clear
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