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Science Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.

Nuclear Physics · Tamil Nadu Board STD 10 (Tamil - English Medium). 40 questions.

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Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.

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40 questions · timed · auto-graded

MCQ 11 Mark
Total energy radiated by Sun is about ____
  • A
    $3.6 \times 10^{28} \mathrm{Js}^{-1}$
  • B
    $3.8 \times 10^{28} \mathrm{Js}^{-1}$
  • ✓
    $3.8 \times 10^{26} \mathrm{Js}^{-1}$
  • D
    $3.8 \times 10^{23} \mathrm{Js}^{-1}$
Answer
Correct option: C.
$3.8 \times 10^{26} \mathrm{Js}^{-1}$
$3.8 \times 10^{26} \mathrm{Js}^{-1}$
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MCQ 21 Mark
The temperature of the interior of Sun is about _____.
  • A
    $1.4 \times 10^7 \mathrm{~K}$
  • B
    $10^8 \mathrm{~K}$
  • ✓
    $14 \times 10^7 \mathrm{~K}$
  • D
    600 K.
Answer
Correct option: C.
$14 \times 10^7 \mathrm{~K}$
$14 \times 10^7 \mathrm{~K}$
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MCQ 31 Mark
The only reactor in the world which uses U-233 as fuel is _____.
  • A
    Zerlina
  • B
    Zerlina
  • ✓
    Kamini
  • D
    Tires.
Answer
Correct option: C.
Kamini
 Kamini
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MCQ 41 Mark
In fast breeder, the coolant system used is _____.
  • A
    heavy water
  • B
    light water
  • ✓
     liquid sodium
  • D
     boiled water.
Answer
Correct option: C.
 liquid sodium
 liquid sodium
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MCQ 51 Mark
The number of neutrons present in ${ }_{92} \mathrm{U}^{235}$ is:
  • A
    133
  • ✓
    143
  • C
    43
  • D
    243
Answer
Correct option: B.
143
143
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MCQ 61 Mark
The reactor in which no moderator used is _____.
  • ✓
     fast breeder reactor
  • B
    pressurised water reactor
  • C
     pressurised heavy water reactor
  • D
     boiled water reactor.
Answer
Correct option: A.
 fast breeder reactor
fast breeder reactor
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MCQ 71 Mark
The explosion of an atom bomb is based on the principle of _____.
  • ✓
     uncontrolled fission reaction
  • B
     fusion reaction
  • C
     controlled fission reaction
  • D
    none of the above.
Answer
Correct option: A.
 uncontrolled fission reaction
 uncontrolled fission reaction
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MCQ 81 Mark
Which of the following is used in the treatment of skin cancer?
  • A
    Radio Cobalt
  • B
     Radio gold
  • ✓
     Radio Cobalt and radio gold
  • D
     none of the above
Answer
Correct option: C.
 Radio Cobalt and radio gold
 Radio Cobalt and radio gold
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MCQ 91 Mark
The first nuclear reactor was built at _____.
  • A
    Kalpakkam, India
  • B
     Hiroshima, Japan
  • ✓
    Chicago, USA
  • D
    Trombay, Bombay.
Answer
Correct option: C.
Chicago, USA
Chicago, USA
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MCQ 101 Mark
The moderator used in nuclear reactor is _____.
  • A
     cadmium
  • B
     boron carbide
  • ✓
     heavy water
  • D
    uranium $\left({ }_{92} \mathrm{U}^{230}\right)$.
Answer
Correct option: C.
 heavy water
 heavy water
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MCQ 111 Mark
In the nucleus of ${ }_{11} \mathrm{Na}^{23}$ the number of protons and neutrons are:
  • A
    12, 11
  • B
    10, 12
  • ✓
    11, 12
  • D
    11, 23
Answer
Correct option: C.
11, 12
 11, 12
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MCQ 131 Mark
Natural uranium consists of _____.
  • A
     99.72 % of U-238
  • B
     0.28 % of U-238
  • C
     0.72 % of U-238
  • ✓
    99.28 % of U-238.
Answer
Correct option: D.
99.28 % of U-238.
99.28 % of U-238.
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MCQ 141 Mark
In the reaction ${ }_1 \mathrm{~N}^{14}+{ }_0 \mathrm{n}^1 \rightarrow \mathrm{X}+{ }_1 \mathrm{H}^1 \mathrm{X}$ is:
  • A
    ${ }_{15} \mathrm{P}^{30}$
  • B
    ${ }_6 \mathrm{C}^{14}$
  • ✓
    ${ }_6 \mathrm{C}^{12}$
  • D
    ${ }_{11} \mathrm{Na}^{23}$
Answer
Correct option: C.
${ }_6 \mathrm{C}^{12}$
${ }_6 \mathrm{C}^{12}$
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MCQ 151 Mark
The energy released per fission is _____.
  • A
    220 MeV
  • B
    300 MeV
  • C
     250 MeV
  • ✓
     200 MeV.
Answer
Correct option: D.
 200 MeV.
 200 MeV.
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MCQ 161 Mark
Which is used as a coolant?
  • A
     Graphite
  • ✓
     Liquid sodium
  • C
     Boron
  • D
     Cadmium
Answer
Correct option: B.
 Liquid sodium
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MCQ 171 Mark
Anaemia can be diagnosed by _____.
  • A
    ${ }_{15} P^{31}$
  • B
    ${ }_{15} P^{32}$
  • ✓
    ${ }_{26} P^{59}$
  • D
    ${ }_{11} P^{24}$
Answer
Correct option: C.
${ }_{26} P^{59}$
${ }_{26} P^{59}$
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MCQ 181 Mark
Which one of the following is used in the treatment of skin diseases _____.
  • A
    $\mathrm{Na}^{24}$
  • B
    $1^{31}$
  • C
    $\mathrm{Fe}^{59}$
  • ✓
    $P^{32}$
Answer
Correct option: D.
$P^{32}$
$P^{32}$
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MCQ 191 Mark
In the nuclear reaction ${ }_{88} \mathrm{Ra}^{226} \rightarrow \mathrm{X}+{ }_2 \mathrm{He}^4 \mathrm{X}$ is:
  • A
    ${ }_{90} \mathrm{Th}^{234}$
  • B
    ${ }_{91} \mathrm{~Pa}^{234}$
  • C
    ${ }_{86} \mathrm{Rn}^{222}$
  • ✓
    $88 \mathrm{Rn}^{226}$
Answer
Correct option: D.
$88 \mathrm{Rn}^{226}$
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MCQ 201 Mark
An element $Z^{X^A}$ successively undergoes three $\alpha$ decays and four $\beta$ decays and gets converted an element $Y$ are respectively
  • A
    ${ }_{Z-6} Y^{A-12}$
  • B
    $Z+2 Y^{A-12}$
  • ✓
    ${ }_{Z-2} Y^{A-12}$
  • D
    $Z_{-10} Y^{A-12}$
Answer
Correct option: C.
${ }_{Z-2} Y^{A-12}$
${ }_{Z-2} Y^{A-12}$
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MCQ 211 Mark
Rd is equal to _____.
  • ✓
    $10^6$ decay / second
  • B
    1 decay / second
  • C
    $3.7 \times 10^{10}$ becquerel
  • D
    $1.6 \times 10^{12}$ decay / second.
Answer
Correct option: A.
$10^6$ decay / second
$10^6$ decay / second
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MCQ 221 Mark
The range of temperature required for nuclear fusion is from:
  • ✓
    $10^7$ to $10^9 \mathrm{~K}$
  • B
    $10^{-9}$ to $10^{-7} \mathrm{~K}$
  • C
    $10^5$ to $10^9$
  • D
    $10^5$ to $10^7 \mathrm{~K}$
Answer
Correct option: A.
$10^7$ to $10^9 \mathrm{~K}$
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MCQ 231 Mark
The unit of decay constant is _____.
  • A
    no unit
  • B
    second
  • ✓
    second $^{-1}$
  • D
     curie.
Answer
Correct option: C.
second $^{-1}$
second $^{-1}$
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MCQ 241 Mark
In γ – decay _____.
  • A
    atomic number decreases by one
  • B
    there is no change in atomic and mass number
  • C
    energy only changes in the decay process
  • ✓
    both (b) and (c).
Answer
Correct option: D.
both (b) and (c).
both (b) and (c).
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MCQ 251 Mark
In which decay the energy level of the nucleus changes:
  • A
    $\alpha –$ decay
  • B
    $\beta –$ decay
  • ✓
    $γ – $decay
  • D
    neutron decay
Answer
Correct option: C.
$γ – $decay
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MCQ 261 Mark
In β – decay _____.
  • A
    atomic number decreases by one
  • B
    the mass number decreases by one
  • C
    proton number remains the same
  • ✓
    neutron number decreases by one.
Answer
Correct option: D.
neutron number decreases by one.
neutron number decreases by one
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MCQ 271 Mark
Which has low penetrating power?
  • ✓
    α rays
  • B
    γ rays
  • C
    β rays
  • D
    X rays.
Answer
Correct option: A.
α rays
α rays
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MCQ 291 Mark
Ionization power maximum for _____.
  • A
    neutrons
  • ✓
    α particles
  • C
    γ rays
  • D
    β particles.
Answer
Correct option: B.
α particles
α particles
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MCQ 301 Mark
Ionising power of the γ rays _____.
  • A
    Comparatively very high ionization power
  • B
    100 times greater than the α rays
  • C
    100 times greater than the β rays
  • ✓
    Comparatively very less ionization power.
Answer
Correct option: D.
Comparatively very less ionization power.
Comparatively very less ionization power.
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MCQ 311 Mark
Which produces a charge of 2.58 × 10-4 Coulomb in 1 Kg of air?
  • A
    Curie
  • B
    Becquerel
  • C
    Rutherford
  • ✓
    Roentgen
Answer
Correct option: D.
Roentgen
Roentgen
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MCQ 321 Mark
Arrange α, β, γ rays in the increasing order of their ionizing power.
  • A
    α, β, γ
  • B
    β, α, γ
  • ✓
    γ, β, α
  • D
    γ, α, β.
Answer
Correct option: C.
γ, β, α
γ, β, α
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MCQ 331 Mark
The atomic number of the elements that exhibit artifical radioactivity is:
  • A
    more than 82
  • B
    more than 83
  • ✓
    less than 83
  • D
    less than 82
Answer
Correct option: C.
less than 83
less than 83
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MCQ 361 Mark
Which of the following processes is a spontaneous process?
  • A
    Artifical radioactivity
  • ✓
    Natural radioactivity
  • C
    Photoelectric effect
  • D
    Collisions
Answer
Correct option: B.
Natural radioactivity
Natural radioactivity
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MCQ 371 Mark
Radioactivity is _____.
  • A
    increases with increase in temperature
  • B
    increases with increase in pressure
  • C
    depends on the number of electrons
  • ✓
    purely a nuclear phenomenon.
Answer
Correct option: D.
purely a nuclear phenomenon.
purely a nuclear phenomenon
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MCQ 381 Mark
The SI unit of Radioactivity is _____.
  • A
    Curie
  • B
    Rutherford
  • ✓
    Becquerel
  • D
    Roentgen (R).
Answer
Correct option: C.
Becquerel
Becquerel
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MCQ 401 Mark
Radium was discovered by _____.
  • ✓
    Marie curie
  • B
    Irene curie
  • C
    Henri Becquerel
  • D
    F. Joliot.
Answer
Correct option: A.
Marie curie
Marie Curie
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