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

done Discovery and Properties of anode, cathode rays neutron and Nuclear structure Total Questions - 41

• question_answer1)
  A neutral atom (Atomic no. > 1) consists of          [CPMT 1982]
  A)
                  Only protons           done clear
  B)
                  Neutrons + protons done clear
  C)
                  Neutrons + electrons done clear
  D)
                  Neutron + proton + electron done clear
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• question_answer2)
  The nucleus of the atom consists of [CPMT 1973, 74, 78, 83, 84; MADT Bihar 1980; DPMT 1982, 85; MP PMT 1999]
  A)
                  Proton and neutron done clear
  B)
                  Proton and electron done clear
  C)
                  Neutron and electron done clear
  D)
                  Proton, neutron and electron done clear
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• question_answer3)
  The size of nucleus is of the order of [CPMT 1982; MP PMT 1991]
  A)
                  \[{{10}^{-12}}m\]   done clear
  B)
                  \[{{10}^{-8}}m\] done clear
  C)
                  \[{{10}^{-15}}m\]   done clear
  D)
                  \[{{10}^{-10}}m\] done clear
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• question_answer4)
  Positive ions are formed from the neutral atom by the [CPMT 1976]
  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_answer5)
  The electron is        [DPMT 1982; MADT Bihar 1980]
  A)
                  \[\alpha \]-ray particle           done clear
  B)
                  \[\beta \]-ray particle done clear
  C)
                  Hydrogen ion          done clear
  D)
                  Positron done clear
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• question_answer6)
  Who discovered neutron [IIT 1982; BITS 1988;CPMT 1977; NCERT 1974; MP PMT 1992; MP PET 2002]
  A)
                  James Chadwick     done clear
  B)
                  William Crooks done clear
  C)
                  J.J. Thomson           done clear
  D)
                  Rutherford done clear
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• question_answer7)
  The ratio of charge and mass would be greater for  [BHU 2005]
  A)
                  Proton     done clear
  B)
                  Electron done clear
  C)
                  Neutron   done clear
  D)
                  Alpha done clear
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• question_answer8)
  Magnitude of K.E. in an orbit is equal to                 [BCECE 2005]
  A)
                  Half of the potential energy        done clear
  B)
                  Twice of the potential energy done clear
  C)
                  One fourth of the potential energy done clear
  D)
                  None of these done clear
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• question_answer9)
  The density of neutrons is of the order  [NCERT 1980]
  A)
                  \[{{10}^{3}}kg/cc\]          done clear
  B)
                  \[{{10}^{6}}kg/cc\] done clear
  C)
                  \[{{10}^{9}}kg/cc\]          done clear
  D)
                  \[{{10}^{11}}kg/cc\] done clear
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• question_answer10)
  The discovery of neutron becomes very late because [CPMT 1987; AIIMS 1998]
  A)
                  Neutrons are present in nucleus done clear
  B)
                  Neutrons are highly unstable particles done clear
  C)
                  Neutrons are chargeless done clear
  D)
                  Neutrons do not move done clear
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• question_answer11)
  The fundamental particles present in the nucleus of an atom are                                              [CPMT 1983, 84]
  A)
                  Alpha particles and electrons done clear
  B)
                  Neutrons and protons done clear
  C)
                  Neutrons and electrons done clear
  D)
                  Electrons, neutrons and protons done clear
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• question_answer12)
  The order of density in nucleus is [NCERT 1981, CPMT 1981, 2003]
  A)
                  \[{{10}^{8}}kg/cc\]          done clear
  B)
                  \[{{10}^{-8}}kg/cc\] done clear
  C)
                  \[{{10}^{-9}}kg/cc\]         done clear
  D)
                  \[{{10}^{12}}kg/cc\] done clear
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• question_answer13)
  Cathode rays are              [JIPMER 1991; NCERT 1976]
  A)
                  Protons                done clear
  B)
                  Electrons done clear
  C)
                  Neutrons             done clear
  D)
                  \[\alpha \]-particles done clear
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• question_answer14)
  Number of neutron in \[{{C}^{12}}\] is   [BCECE 2005]                        
  A)
                  6              done clear
  B)
                  7 done clear
  C)
                  8              done clear
  D)
                  9 done clear
  View Solution play_arrow

• question_answer15)
  Heaviest particle is          [DPMT 1983; MP PET 1999]
  A)
                  Meson  done clear
  B)
                  Neutron done clear
  C)
                  Proton  done clear
  D)
                  Electron done clear
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• question_answer16)
  Penetration power of proton is [BHU 1985; CPMT 1982, 88]
  A)
                  More than electron        done clear
  B)
                  Less than electron done clear
  C)
                  More than neutron         done clear
  D)
                  None done clear
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• question_answer17)
  An elementary particle is              [CPMT 1973]
  A)
                  An element present in a compound done clear
  B)
                  An atom present in an element done clear
  C)
                  A sub-atomic particle done clear
  D)
                  A fragment of an atom done clear
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• question_answer18)
  The nucleus of helium contains [CPMT 1972; DPMT 1982]                          
  A)
                  Four protons done clear
  B)
                  Four neutrons done clear
  C)
                  Two neutrons and two protons done clear
  D)
                  Four protons and two electrons done clear
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• question_answer19)
  Which is correct statement about proton [CPMT 1979; MP PMT 1985; NCERT 1985; MP PET 1999]
  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_answer20)
  Cathode rays are made up of     [AMU 1983]
  A)
                  Positively charged particles done clear
  B)
                  Negatively charged particles done clear
  C)
                  Neutral particles done clear
  D)
                  None of these done clear
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• question_answer21)
  Anode rays were discovered by                [DPMT 1985]
  A)
                  Goldstein            done clear
  B)
                  J. Stoney done clear
  C)
                  Rutherford         done clear
  D)
                  J.J. Thomson done clear
  View Solution play_arrow

• question_answer22)
  The radius of an atom is of the order of [AMU 1982; IIT 1985; MP PMT 1995]
  A)
                  \[{{10}^{-10}}cm\]           done clear
  B)
                  \[{{10}^{-13}}cm\] done clear
  C)
                  \[{{10}^{-15}}cm\]           done clear
  D)
                  \[{{10}^{-8}}cm\] done clear
  View Solution play_arrow

• question_answer23)
  Neutron possesses                                         [CPMT 1982]
  A)
                  Positive charge done clear
  B)
                  Negative charge done clear
  C)
                  No charge           done clear
  D)
                  All are correct done clear
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• question_answer24)
  Neutron is a fundamental particle carrying           [CPMT 1990]
  A)
                  A charge of +1 unit and a mass of 1 unit done clear
  B)
                  No charge and a mass of 1 unit done clear
  C)
                  No charge and no mass done clear
  D)
                  A charge of ?1 and a mass of 1 unit done clear
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• question_answer25)
  Cathode rays have          [CPMT 1982]
  A)
                  Mass only            done clear
  B)
                  Charge only done clear
  C)
                  No mass and charge       done clear
  D)
                  Mass and charge both done clear
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• question_answer26)
  The size of nucleus is measured in [EAMCET 1988; CPMT 1994]
  A)
                  amu       done clear
  B)
                  Angstrom done clear
  C)
                  Fermi    done clear
  D)
                  cm done clear
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• question_answer27)
  Which phrase would be incorrect to use [AMU (Engg.) 1999]
  A)
                  A molecular of a compound done clear
  B)
                  A molecule of an element done clear
  C)
                  An atom of an element done clear
  D)
                  None of these done clear
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• question_answer28)
  Which one of the following pairs is not correctly matched [MP PET 2002]
  A)
                  Rutherford-Proton          done clear
  B)
                  J.J. Thomsom-Electron done clear
  C)
                  J.H. Chadwick-Neutron done clear
  D)
                  Bohr-Isotope done clear
  View Solution play_arrow

• question_answer29)
  Proton was discovered by                                            [AFMC 2004]
  A)
                  Chadwick             done clear
  B)
                  Thomson done clear
  C)
                  Goldstein            done clear
  D)
                  Bohr                 done clear
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• question_answer30)
  The minimum real charge on any particle which can exist is [RPMT 2000]
  A)
                  \[1.6\times {{10}^{-19}}\,Coulomb\]       done clear
  B)
                  \[1.6\times {{10}^{-10}}\,Coulomb\] done clear
  C)
                  \[4.8\times {{10}^{-10}}\,Coulomb\]       done clear
  D)
                  Zero done clear
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• question_answer31)
  The nature of anode rays depends upon [MP PET 2004]
  A)
                  Nature of electrode        done clear
  B)
                  Nature of residual gas done clear
  C)
                  Nature of discharge tube             done clear
  D)
                  All the above done clear
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• question_answer32)
  One would expect proton to have very large [Pb. CET 2004]
  A)
                  Ionization potential         done clear
  B)
                  Radius done clear
  C)
                  Charge  done clear
  D)
                  Hydration energy done clear
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• question_answer33)
  The mass of a mol of proton and electron is
  A)
                  \[6.023\times {{10}^{23}}g\]       done clear
  B)
                  \[1.008g\] and \[0.55mg\] done clear
  C)
                  \[9.1\times {{10}^{-28}}kg\]        done clear
  D)
                  \[2gm\] done clear
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• question_answer34)
  The average distance of an electron in an atom from its nucleus is of the order of                             [MP PET 1996]
  A)
                  \[{{10}^{6}}m\] done clear
  B)
                  \[{{10}^{-6}}m\] done clear
  C)
                  \[{{10}^{-10}}m\]             done clear
  D)
                  \[{{10}^{-15}}m\] done clear
  View Solution play_arrow

• question_answer35)
  The mass of 1 mole of electrons is            [Pb. CET 2004]
  A)
                  \[9.1\times {{10}^{-28}}g\]          done clear
  B)
                  \[1.008\,mg\] done clear
  C)
                  \[0.55\,mg\]       done clear
  D)
                  \[9.1\times {{10}^{-27}}g\] done clear
  View Solution play_arrow

• question_answer36)
  The ratio of specific charge of a proton and an \[\alpha \]-particle is [MP PET 1999]
  A)
                  2 : 1        done clear
  B)
                  1 : 2 done clear
  C)
                  1 : 4        done clear
  D)
                  1 : 1 done clear
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• question_answer37)
  Ratio of masses of proton and electron is             [BHU 1998]
  A)
                  Infinite done clear
  B)
                  \[1.8\times {{10}^{3}}\] done clear
  C)
                  1.8          done clear
  D)
                  None of these done clear
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• question_answer38)
  Splitting of signals is caused by   [Pb. PMT 2000]
  A)
                  Proton  done clear
  B)
                  Neutron done clear
  C)
                  Positron               done clear
  D)
                  Electron done clear
  View Solution play_arrow

• question_answer39)
  The proton and neutron are collectively called as [MP PET 2001]
  A)
                  Deutron               done clear
  B)
                  Positron done clear
  C)
                  Meson  done clear
  D)
                  Nucleon done clear
  View Solution play_arrow

• question_answer40)
  Which of the following has the same mass as that of an electron                                               [AFMC 2002]
  A)
                  Photon done clear
  B)
                  Neutron done clear
  C)
                  Positron               done clear
  D)
                  Proton done clear
  View Solution play_arrow

• question_answer41)
  What is the ratio of mass of an electron to the mass of a proton [UPSEAT 2004]
  A)
                  1 : 2        done clear
  B)
                  1 : 1 done clear
  C)
                  1 : 1837 done clear
  D)
                  1 : 3 done clear
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