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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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