JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank

done Radioactivity and a,b rays Total Questions - 39

• question_answer1)
  Which of the following does not contain material particles [BHU 2002]
  A)
                  Alpha rays           done clear
  B)
                  Beta rays done clear
  C)
                  Gamma rays       done clear
  D)
                  Canal rays done clear
  View Solution play_arrow

• question_answer2)
  Radioactive substances emit g-rays, which are  [Orissa JEE 2002]
  A)
                  + ve charged particle      done clear
  B)
                  ? ve charged particle done clear
  C)
                  Massive particle               done clear
  D)
                  Packet of energy done clear
  View Solution play_arrow

• question_answer3)
  Which statement is incorrect      [CPMT 1982]
  A)
                  \[\alpha \]-rays have more penetrating power than \[\beta \]-rays done clear
  B)
                  \[\alpha \]-rays have less penetrating power than \[\gamma \]-rays done clear
  C)
                  \[\beta \]-rays have less penetrating power than \[\gamma \]-rays done clear
  D)
                  \[\beta \]-rays have more penetrating power than \[\alpha \]-rays done clear
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• question_answer4)
  The velocity of \[\alpha \]-rays is approximately                [CPMT 1982]
  A)
                  Equal to that of the velocity of light done clear
  B)
                  1/10 of the velocity of light done clear
  C)
                  10 times more than the velocity of light done clear
  D)
                  Uncomparable to the velocity of light done clear
  View Solution play_arrow

• question_answer5)
  The radiations having high penetrating power and not affected by electrical and magnetic field are          [Kerala CET 1992]
  A)
                  Alpha rays           done clear
  B)
                  Beta rays done clear
  C)
                  Gamma rays       done clear
  D)
                  Neutrons done clear
  View Solution play_arrow

• question_answer6)
  Alpha particles are ...... times heavier (approximately) than neutrons     [CPMT 1971]
  A)
                  2              done clear
  B)
                  4 done clear
  C)
                  3              done clear
  D)
                  \[2\frac{1}{2}\] done clear
  View Solution play_arrow

• question_answer7)
  Uranium \[_{92}{{U}^{235}}\] on bombardment with slow neutrons produces   [CPMT 1982]
  A)
                  Deutrons             done clear
  B)
                  Fusion reaction done clear
  C)
                  Fission reaction done clear
  D)
                  Endothermic reaction done clear
  View Solution play_arrow

• question_answer8)
  a-particles can be detected using            [AIIMS 2005]
  A)
                  Thin aluminum sheet     done clear
  B)
                  Barium sulphate done clear
  C)
                  Zinc sulphide screen       done clear
  D)
                  Gold foil done clear
  View Solution play_arrow

• question_answer9)
  Alpha rays consist of a stream of               [BHU 1979]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[H{{e}^{+2}}\] done clear
  C)
                  Only electrons   done clear
  D)
                  Only neutrons done clear
  View Solution play_arrow

• question_answer10)
  Which is the correct statement  [CPMT 1971]
  A)
                  Isotopes are always radioactive done clear
  B)
                  \[\beta \]-rays are always negatively charged particles done clear
  C)
                  \[\alpha \]-rays are always negatively charged particles done clear
  D)
                  \[\gamma \]-rays can be deflected in magnetic field done clear
  View Solution play_arrow

• question_answer11)
  The \[\alpha \]-particle is identical with [CPMT 1972, 82, 86;  BHU 1984; MP PMT 1990, 91, 93; MP PET 1999]
  A)
                  Helium nucleus done clear
  B)
                  Hydrogen nucleus done clear
  C)
                  Electron done clear
  D)
                  Proton done clear
  View Solution play_arrow

• question_answer12)
  If by mistake some radioactive substance gets inside the human body, then from the point of view of radiation damage, the most harmful will be the one which emits [DPMT 1986]
  A)
                  \[\gamma \]-rays             done clear
  B)
                  Neutrons done clear
  C)
                  \[\beta \]-particles          done clear
  D)
                  \[\alpha \]-particles done clear
  View Solution play_arrow

• question_answer13)
  Radioactivity was discovered by [CPMT 1983, 88; DPMT 1982; AMU 1983; MADT Bihar 1982]
  A)
                  Henry Becquerel              done clear
  B)
                  Rutherford done clear
  C)
                  J. J. Thomson     done clear
  D)
                  Madam Curie done clear
  View Solution play_arrow

• question_answer14)
  Which of the following is radioactive element     [CPMT 1988]
  A)
                  Sulphur                done clear
  B)
                  Polonium done clear
  C)
                  Tellurium             done clear
  D)
                  Selenium done clear
  View Solution play_arrow

• question_answer15)
  Penetrating power of a-particle is           [MP PMT 2002]
  A)
                  More than g-rays             done clear
  B)
                  More than b-rays done clear
  C)
                  Less than b-rays               done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer16)
  b-particle is emitted in radioactivity by  [AIEEE 2002; MP PMT 2004]
  A)
                  Conversion of proton to neutron done clear
  B)
                  Form outermost orbit done clear
  C)
                  Conversion of neutron to proton done clear
  D)
                  b-particle is not emitted done clear
  View Solution play_arrow

• question_answer17)
  \[\alpha \]-rays have      [CPMT 1973, 78; NCERT 1977]
  A)
                  Positive charge done clear
  B)
                  Negative charge done clear
  C)
                  No charge done clear
  D)
                  Sometimes positive charge and sometimes negative charge done clear
  View Solution play_arrow

• question_answer18)
  X-rays are produced due to          [JIPMER 2002]
  A)
                  Bombarding of electrons on solids done clear
  B)
                  Bombarding of a-particle on solids done clear
  C)
                  Bombarding of g-rays on solids done clear
  D)
                  Bombarding of neutron on solids done clear
  View Solution play_arrow

• question_answer19)
  Choose the element which is not radioactive      [CPMT 1988]
  A)
                  \[Cm\]  done clear
  B)
                  \[No\] done clear
  C)
                  \[Mo\] done clear
  D)
                  \[Md\] done clear
  View Solution play_arrow

• question_answer20)
  A magnet will cause the greatest deflection of [MP PMT 1991]
  A)
                  \[\gamma \]-rays             done clear
  B)
                  \[\beta \]-rays done clear
  C)
                  \[\alpha \]-rays                 done clear
  D)
                  Neutrons done clear
  View Solution play_arrow

• question_answer21)
  Of the following radiations, the one most easily stopped by air is              [MP PMT 1991]
  A)
                  \[\alpha \]-rays                 done clear
  B)
                  \[\beta \]-rays done clear
  C)
                  \[\gamma \]-rays             done clear
  D)
                  X-rays done clear
  View Solution play_arrow

• question_answer22)
  Uranium ultimately decays into a stable isotope of [MP PET 1995]
  A)
                  Radium done clear
  B)
                  Carbon done clear
  C)
                  Lead      done clear
  D)
                  Neptunium done clear
  View Solution play_arrow

• question_answer23)
  Which leaves no track on Wilson cloud chamber [AFMC 1988]
  A)
                  Electrons             done clear
  B)
                  Protons done clear
  C)
                  \[\alpha \]-particles        done clear
  D)
                  Neutrons done clear
  View Solution play_arrow

• question_answer24)
  Which has the least penetrating power [CPMT 1994]
  A)
                  \[\beta \]-rays  done clear
  B)
                  \[\alpha \]-rays done clear
  C)
                  \[\gamma \]-rays             done clear
  D)
                  \[X\]-rays done clear
  View Solution play_arrow

• question_answer25)
  There exists on \[\gamma \]-rays [MP PMT 1996; Pb. PMT 2004; EAMCET 2004]
  A)
                  Positive charge done clear
  B)
                  Negative charge done clear
  C)
                  No charge done clear
  D)
                  Sometimes positive charge, sometimes negative charge done clear
  View Solution play_arrow

• question_answer26)
  Which is not emitted by radioactive substance [AIIMS 1997]
  A)
                  \[\alpha \]-rays done clear
  B)
                  \[\beta \]-rays done clear
  C)
                  Positron               done clear
  D)
                  Proton done clear
  View Solution play_arrow

• question_answer27)
  The radiations from a naturally occurring radio element, as seen after deflection in a magnetic field in one direction, are                         [IIT 1984; MP PMT 1986;  MP PET/PMT 1988 JIPMER 1999]
  A)
                  Definitely a-rays              done clear
  B)
                  Definitely b-rays done clear
  C)
                  Both a and b-rays            done clear
  D)
                  Either a or b-rays done clear
  View Solution play_arrow

• question_answer28)
  The \[_{88}R{{a}^{226}}\] is             [AIIMS 2001]
  A)
                  n-mesons            done clear
  B)
                  u-mesons done clear
  C)
                  Radioactive done clear
  D)
                  Non-radioactive done clear
  View Solution play_arrow

• question_answer29)
  During b-decay [UPSEAT 2001]
  A)
                  An atomic electron is ejected done clear
  B)
                  An electron which is already present with in the nucleus is ejected  done clear
  C)
                  A neutron in the nucleus decays emitting an electron done clear
  D)
                  A part of binding of the nucleus is converted into an electron done clear
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• question_answer30)
  The element californium belongs to the family of [UPSEAT 2002]
  A)
                  Actinide series  done clear
  B)
                  Alkali metal family done clear
  C)
                  Alkaline earth family       done clear
  D)
                  Lantanide series done clear
  View Solution play_arrow

• question_answer31)
  Which of the following is not deflected by magnetic field [MP PMT 2001]
  A)
                  Deuteron            done clear
  B)
                  Positron done clear
  C)
                  Proton  done clear
  D)
                  Photon done clear
  View Solution play_arrow

• question_answer32)
  Which of the following can be used to convert \[_{7}^{14}N\] into \[_{8}^{17}O\]                [MP PMT 2001]
  A)
                  Deuteron            done clear
  B)
                  Proton done clear
  C)
                  a-particle            done clear
  D)
                  Neutron done clear
  View Solution play_arrow

• question_answer33)
  The amount of energy, which is required to separate the nucleons from a nucleus. The energy is called [UPSEAT 2001]
  A)
                  Binding energy done clear
  B)
                  Lattice energy done clear
  C)
                  Kinetic energy   done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer34)
  What happens when a-particle is emitted [CBSE PMT 1989; JIPMER 2002]
  A)
                  Mass number decreases by 12 unit, atomic number decreases by 4 unit  done clear
  B)
                  Mass number decreases by 4 unit, atomic number decreases by 2 unit done clear
  C)
                  Only mass number decreases done clear
  D)
                  Only atomic number decreases done clear
  View Solution play_arrow

• question_answer35)
  The charge on gamma rays is [Pb. PMT 2004; EAMCET 2004]
  A)
                  Zero       done clear
  B)
                  +1 done clear
  C)
                  ?1           done clear
  D)
                  +2 done clear
  View Solution play_arrow

• question_answer36)
  A nuclear reaction is accompanied by loss of mass equivalent to \[0.01864\ amu\]. Energy liberated is    [DCE 2002]
  A)
                  \[931\ MeV\]     done clear
  B)
                  \[186.6\ MeV\] done clear
  C)
                  \[17.36\ MeV\] done clear
  D)
                  \[460\ MeV\] done clear
  View Solution play_arrow

• question_answer37)
  Nuclear theory of the atom was put forward by    [KCET 2004]
  A)
                  Rutherford         done clear
  B)
                  Aston done clear
  C)
                  Neils Bohr           done clear
  D)
                  J.J. Thomson done clear
  View Solution play_arrow

• question_answer38)
  Decrease in atomic number is observed during [IIT 1998]
  A)
                  Alpha emission done clear
  B)
                  Beta emission done clear
  C)
                  Positron emission            done clear
  D)
                  Electron capture done clear
  View Solution play_arrow

• question_answer39)
  Calculate mass defect in the following reaction                 \[_{1}{{H}^{2}}{{+}_{1}}{{H}^{3}}{{\to }_{1}}H{{e}^{4}}{{+}_{0}}{{n}^{1}}\]                 (Given : mass \[{{H}^{2}}=2.014,\,{{H}^{3}}=3.016,\,He=4.004,\] \[n=1.008\,amu\])          [Kerala CET 2005]
  A)
                  0.018 amu           done clear
  B)
                  0.18 amu done clear
  C)
                  0.0018 amu done clear
  D)
                  1.8 amu done clear
  E)
                  18 amu done clear
  View Solution play_arrow