GRADE 12 – PHYSICS CHAPTER NO.10 NUCLEAR PHYSICS Test No.2 – Online MCQs MDCAT, UHS, PMC & ECAT Preparation
PHYSICS – 2nd Year
Chapter Name : NUCLEAR PHYSICS
Chapter No. 10 [ Test No. 2 ]
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.
Book Name : PHYSICS
Chapter No. 10 (Test No. 2 )
Chapter Name : NUCLEAR PHYSICS
Total MCQ from Text Book : 157
Book Version : 2020
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 12 ( F.Sc. Intermediate)
Total Marks : 157
Total Time : 157 minutes 30 Seconds
GRADE 12 - PHYSICS CHAPTER NO.10 NUCLEAR PHYSICS Test No. 2
GRADE 12 - PHYSICS CHAPTER NO.10 NUCLEAR PHYSICS Test No. 2
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Question 1 |
γ-emission from the nucleus of an atom causes a (SGD 2015 Group II)
A | Change inZ |
B | Change in A |
C | Change in both A and Z |
D | No change in A and Z |
Question 2 |
In a nuclear reactor, cadmium rods are used to
A | Speed up neutrons |
B | Absorb neutrons |
C | Produce neutron |
D | Slow down neutron |
Question 3 |
The number of protons or electrons in an atom is called
A | None of these |
B | Atomic number |
C | Both of above |
D | Charge number |
Question 4 |
When a nucleus emits alpha particle, its charge number decreases by
A | 5 |
B | 2 |
C | 3 |
D | 6 |
Question 5 |
Geiger Muller counter is not used for
A | Slow counting |
B | Both slow and fast counting |
C | None of these |
D | Fast Counting |
Question 6 |
Consider α - particles, β - particles and r-rays each having an energy of 0.5MeV. In increasing order of penetrating power. The radiations ae
A | r,β, &alpha |
B | α, β, r |
C | α, r, β |
D | β, r, α |
Question 7 |
Which of the following is the pair of isobars
A | 6C12 and 6C13 |
B | 1H1 and 1H2 |
C | 1H2 and 1H3 |
D | 15P30 and 14Si30 |
Question 8 |
PWR stands for
A | Pressurize wind reactor |
B | None of these |
C | Power wind reactor |
D | Pressurize water reactor |
Question 9 |
Both Xenon and cesium each have (D.G.Khan 2015 Group I)
A | 33 isotopes |
B | 36 isotopes |
C | 34 isotopes |
D | 35 isotopes |
Question 10 |
The half life of a radioactive element which ahas only 1/32 of its orininal mass left after a lapse of 60 days is
A | 15 days |
B | 30 days |
C | 20 days |
D | 12 days |
Question 11 |
The particles equal in mas or greater than protons are called: (MTN 2015 Group I)
A | Baryons |
B | Hadrons |
C | Mesons |
D | Fermions |
Question 12 |
The chemical properties of all the isotopes of an element are
A | None of these |
B | Different |
C | Same |
D | Slightly different |
Question 13 |
Beta(β)particles are:
A | Electrons |
B | Protons |
C | All of these |
D | Photons |
Question 14 |
Absorbed Dose "D" is defined as: (SWL 2015)
A | C/m |
B | E/C |
C | M/E |
D | E/m |
Question 15 |
The number o neutrons in the nucleus of 23592U are
A | None of these |
B | 92 |
C | 143 |
D | 235 |
Question 16 |
Which of the following is not affected by the electric or magnetic field?
A | α-rays |
B | All of these |
C | γ-rays |
D | β-rays |
Question 17 |
Curie is a unit of
A | Conductivity |
B | Radioactivity |
C | Binding energy |
D | Resistivity |
Question 18 |
In heavier elements
A | N > Z |
B | N < Z |
C | N ≤ Z |
D | C < Z |
Question 19 |
Which of the following is the percentage of the original quantity of a radioactive material left after fie half-lives approximately
A | 3% |
B | 10% |
C | 5% |
D | 20% |
Question 20 |
The reciprocal of the decay constant of a radioactive substance is known as
A | mean life |
B | half life |
C | none of the above |
D | Total life |
Question 21 |
Hydrogen atoms with only one proton in its nucleus and one electron in its orbit is called
A | Protium |
B | Tritium |
C | Deuterium |
D | Deutron |
Question 22 |
In Wilson cloud chamber, track of &beta-particles is
A | Thin and discontinuous |
B | all of these |
C | Erratic |
D | Frequent deflected |
Question 23 |
Average number of neutrons produced in each fssion reaction are
A | 3 |
B | 6 |
C | 5 |
D | 4 |
Question 24 |
Circulation of Blood can be studied by using Radioactive Isotope: (BWP 2015)
A | iodine-131 |
B | cobalt-60 |
C | phosphorous-32 |
D | sodium-24 |
Question 25 |
β-particles carries a charge
A | #NAME? |
B | -2e |
C | +2e |
D | +4e |
Question 26 |
Various types of cancer are treated by
A | carbon-14 |
B | cobalt-60 |
C | nickel-63 |
D | Strontium 90 |
Question 27 |
Which of the following is a good nuclear fuel?
A | Neptunium-239 |
B | Plutonium-239 |
C | Thorium-236 |
D | Uranium-236 |
Question 28 |
Of the three basic gravitational, electrostatic and nuclear forces, which two are able to provide an attractive force between two neutrons?
A | Gravitational and electrostatic |
B | Electrostatic and nuclear |
C | All of the above |
D | Gravitational and nuclear |
Question 29 |
In fusion reaction, the energy released per nucleon is about(in p-p chain reaction)
A | 2 MeV |
B | 5 MeV |
C | 15 MeV |
D | 6.4 MeV |
Question 30 |
Subatomic particles are divided into:
A | Photons |
B | Leptons |
C | All of these |
D | Hardens |
Question 31 |
In beta-decay, which one of the following reactions take place
A | 40n → 21H + °ree;1e |
B | 40n → 11H + °ree;1e |
C | 40n → 11H + °ree;1e |
D | 11H → 40n + °ree;1e |
Question 32 |
During fission process, the energy release per nucleon is about
A | 2 MeV |
B | 1 MeV |
C | 3 MeV |
D | 4 MeV |
Question 33 |
The charge on an Alpha particle is equal to: (BWP 2015)
A | #NAME? |
B | #NAME? |
C | -2e |
D | 2e |
Question 34 |
The uncontrolled fission chain reaction results into the formation is
A | hydrogen bomb |
B | none of these |
C | nuclear bomb |
D | cobalt bomb |
Question 35 |
α - particle carries a change: (GRW 2015)
A | no charge |
B | -2e |
C | +2e |
D | #NAME? |
Question 36 |
Dr. Abdul Salam was awarded noble prize in
A | 1969 |
B | 1985 |
C | 1979 |
D | 1989 |
Question 37 |
Marie Curie and Pierre Curie discovered two new radioactive elements which are
A | Polonium and uraniam |
B | Uranium and radium |
C | Polonium and radium |
D | Plantinum and radium |
Question 38 |
The source of solar energy is mainly due to
A | Pair production |
B | All of these |
C | Fission |
D | Fusion |
Question 39 |
Binding energy for deuteron nucleus is given by: (LHR 2015 Group I)
A | 2.28 MeV |
B | 2.8 MeV |
C | 2.25 MeV |
D | 2.23 MeV |
Question 40 |
Weak nuclear force is
A | Short range |
B | Medium range |
C | none of these |
D | Long range |
Question 41 |
One-eighth of the initial mass of a certain radioactive isotope remain undecayed after one hour. Which of the following is the half life of isotope in minutes?
A | 8 min |
B | 45 min |
C | 20 min |
D | 30 min |
Question 42 |
The thin wire in the centre of G.M. tube is
A | Negatively charged |
B | Neutral |
C | Positively charged |
D | None of these |
Question 43 |
Xenon has 36 isotopes while cesium has ___________ isotopes
A | 36 |
B | None of these |
C | 24 |
D | 12 |
Question 44 |
1u (unified mass scale) is equivalent to
A | 88 MeV |
B | 785 MeV |
C | 900 MeV |
D | 931 MeV |
Question 45 |
In alpha decay
A | Daughter nucleus has one netutron less than parent nucleus |
B | Daughter nucleus has two protons less than partent nucleus |
C | Parent and daugher nuclei have same number of protons |
D | Daughter nucleus has one proton more than parent nucleus |
Question 46 |
92U nucleus emits two α-particles and two β-particles and transforms into a thorium nucleus. Which of the following is the mass number and atomic number of the thorium nucleus so produced?
A | 230,88 |
B | 230,90 |
C | 234,90 |
D | 234,88 |
Question 47 |
The number isotopes of hydrogen are
A | 3 |
B | 4 |
C | 2 |
D | 1 |
Question 48 |
Artificial radiaoactivity was discovered by
A | Becquerel |
B | Curie |
C | None of these |
D | Maxwell |
Question 49 |
The number of basic forces present in nature are
A | 9 |
B | 5 |
C | 7 |
D | 1 |
Question 50 |
Electrons are: (MTN 2015 Group II)
A | Leptons |
B | Baryons |
C | Quarks |
D | Hardons |
Question 51 |
If Fpp and Pnn and Ppn denotes, respectively the nuclear forces between two protons, between two neutrons and between proton and neutron then
A | Fpp ≠ Fnn = Fpn |
B | Fpp ≠ Fnn ≠ Fpn |
C | Fpp = Fnn = Fpn |
D | Fpp = Fnn ≠ Fpn |
Question 52 |
Using relativistic effects the location of an air craft after an hr flight can be predicted about (BWP 2015)
A | 780 m |
B | 20m |
C | 760 m |
D | 50m |
Question 53 |
A Wilson cloud chamber uses
A | Supersaturated vapours |
B | Vapours |
C | Super heated liquid |
D | Saturated vapours |
Question 54 |
When a charged particle passes through matter, it produces ionization, this effect is used in
A | fusion reaction |
B | fission reaction |
C | reactor |
D | radiation detector |
Question 55 |
The ionization power of β particles
A | Equal to α-particle |
B | Less than α -particle |
C | Greater than α-particle |
D | equal to γ-particle |
Question 56 |
The energy released in the nuclear fission appears in the form of
A | P.E. of fragments |
B | Light |
C | Both a and b |
D | K.E of fragments |
Question 57 |
The number of Quarks are (SGD 2015 Group II)
A | 2 |
B | 4 |
C | 8 |
D | 6 |
Question 58 |
In the fission of 235._________ energy per nucleon is emitted
A | 8.5 MeV |
B | 7.7 MeV |
C | 0.9 MeV |
D | 200 MeV |
Question 59 |
The ionization energy of an atom compared to the binding energy of a nucleus is
A | Less |
B | More |
C | Equal |
D | Sometimes less and sometimes more |
Question 60 |
The total number of protons in any atom are always equal to its number of
A | None of these |
B | Charge number |
C | Atomic number |
D | Mass number |
Question 61 |
When γ-rays are emitted, the nuclear mass (RWP 2016)
A | Increases by 1 unit |
B | Does not change |
C | Increases by 2 units |
D | Decreases by 4 units |
Question 62 |
Radioactivity happens due to the disintegration of
A | Nucleus |
B | Protons |
C | Electrons |
D | Neutron |
Question 63 |
The rate of decay of radioactive substance
A | Is constant |
B | Decreases linearly with time |
C | Decreases exponentially with time |
D | Varies inveresly as time |
Question 64 |
Which one of the following is a radiation detector?
A | Solid state detector |
B | Geiger Muller counter |
C | Wilson cloud chamber |
D | All of these |
Question 65 |
In fission reaction, heavy water is used as a
A | coolant |
B | all of these |
C | moderator |
D | heat exchanger |
Question 66 |
Track of γ-rays is
A | Straight |
B | Irregualr |
C | Thick |
D | Continuous |
Question 67 |
With emission of β-particle from the nucleus, the ratio of neutron to proton
A | None of above |
B | Increases |
C | decreases |
D | remains same |
Question 68 |
One gray(Gy) is equal to
A | 1.6 x 10-19 J/kg |
B | none of these |
C | 1 J/kg |
D | 3.7 x 1010 J/kg |
Question 69 |
In Wilson cloud chamber, track of &alpha-particles is
A | Straight |
B | Thick |
C | all of these |
D | Continuous |
Question 70 |
One gary(Gy) is equal to: (GRW 2016)
A | 4 J/kg |
B | 1 J/kg |
C | 1.6 x 10-10 J/kg |
D | 1.6 x 10-19 J |
Question 71 |
After present unification, the number of fundamental forces are
A | 2 |
B | 3 |
C | 5 |
D | 4 |
Question 72 |
The moderators used in faster reactor is:
A | no moderator |
B | sodium |
C | graphite |
D | water |
Question 73 |
Radiation detectors are used to
A | measure energy of radiation |
B | measure range or penetration power of ionizing particles |
C | all of these |
D | detect different types of radiation |
Question 74 |
Which of the following is a better shield against γ-rays?
A | Ordinary water |
B | Aluminium |
C | Lead |
D | Heavy water |
Question 75 |
In the reaction X + 178O → 117N + 42He, X is?
A | 21H |
B | 1-1e |
C | 10n |
D | 11H |
Question 76 |
A proton consists of quarks which are: (GRW 2015)
A | one up, two down |
B | Two up, one down |
C | all up |
D | all down |
Question 77 |
Hydrogen bomb is an example of
A | Fission reaction |
B | Chain reaction |
C | Fusion reaction |
D | Chemical reaction |
Question 78 |
Hydrogen atom with only one proton and two neutrons in its nuceleus and one electron in its orbt is called
A | Protium |
B | Deuterium |
C | Tritium |
D | Deuteron |
Question 79 |
Enriched uranium is better as a fuel for a nuclear reactor because it has greater proportion of
A | U233 |
B | U238 |
C | U239 |
D | U235 |
Question 80 |
What was the fissionable material used in the atomic bomb droped at Nagasaki(Japan) in the year 1945?
A | Plutonium |
B | Uranium |
C | Thorium |
D | Neptunium |
Question 81 |
The unit of radioactivity "curie" is equal to
A | 3.7 x 1010 disintegration per second |
B | 3.7 x 108 disintegration per second |
C | 3.7 x 109 disintegration per second |
D | 3.7 x 107 disintegration per second |
Question 82 |
Subatomic particles are divided into:
A | Three groups |
B | Four groups |
C | Five groups |
D | Two groups |
Question 83 |
The probability of a radioactive atom to survive 5 times longer than its half period is
A | 5-Feb |
B | (5)2 |
C | (2)5 |
D | (2)-5 |
Question 84 |
Cloud chamber was invented by
A | C.T.R Wilson |
B | Lawrence |
C | Muller |
D | Rutherford |
Question 85 |
The particles equal in mass or greater than protons are called
A | Baryons |
B | Mesons |
C | Leptons |
D | Quarks |
Question 86 |
The average life of the radioactive substance is
A | Sometimes less and sometimes equal to its half life |
B | Greater than tis half life |
C | Less than its half life |
D | Equal to its half life |
Question 87 |
photoelectric effect take place when energy of γ-rays:
A | less than 0.5 MeV |
B | greater than 0.5 MeV |
C | equal to 0.5 MeV |
D | none of these |
Question 88 |
A radioactive isotope X with half life of 1.37 x 109 years decays to Y which is stable. A samp[le of rocks from the moon was found to conain both X and Y in the ratio of 1:7 Which of the following is the age of rocks?
A | 1.96 x 109 years |
B | 9.59 x 109 years |
C | 3.85 x 109 years |
D | 4.11 x 109 years |
Question 89 |
Fundamental forces of nature are
A | Electromagnetic force and weak nuclear force |
B | Strong nuclear force |
C | All of these |
D | Weak nuclear force |
Question 90 |
The constituents of nucleus are held together b
A | Electromagnetic force |
B | Gravitational force |
C | Weak nuclear force |
D | Strong force |
Question 91 |
A pair of quark and anti-quark make a (SGD 20115 Group I)
A | Proton |
B | Electron |
C | Meson |
D | Neutron |
Question 92 |
Electromagnetic force is
A | Short range |
B | Long range |
C | none of these |
D | Medium range |
Question 93 |
Nucleus consists of
A | Electron and proton |
B | Electron and neutron |
C | Electron, proton and neutron |
D | Proton and neutron |
Question 94 |
Isotopes of the nucleus of uranium are:
A | All of these |
B | 23492U |
C | 23592U |
D | 23892U |
Question 95 |
Which of the following are not hadrons? (RWP 2016)
A | Neutrons |
B | Mesons |
C | Protons |
D | Muons |
Question 96 |
Electromagnetic and weak forces were unified by
A | All of these |
B | Glashow |
C | Abdul Salam |
D | Weinberg |
Question 97 |
Natural uranium is a low grade fuel, it is due to high percentage of
A | 23492U |
B | none of these |
C | 23892U |
D | 23592U |
Question 98 |
The background radiation to which we are exposed on the average is
A | 2 mSv per year |
B | 20 mSv per year |
C | 2 Sy per year |
D | 0.01 Sv |
Question 99 |
γ - rays are electromagnetic waves like
A | all of these |
B | heat waves |
C | x-rays |
D | light waves |
Question 100 |
When a nucleus emits β-particle its mass number remains constant but charge number increases by:
A | 1 |
B | 2 |
C | 3 |
D | 4 |
Question 101 |
Structure of the nucleus was explained by
A | Bohr |
B | Thomson |
C | Rutherford |
D | Milikan |
Question 102 |
The most stable element is
A | Cobalt |
B | Iron |
C | Uranium |
D | Copper |
Question 103 |
Gamma(γ) rays consists of stream of
A | protons |
B | all of these |
C | photons |
D | electrons |
Question 104 |
The binding energy per nucleus for uranium is about
A | 200 MeV |
B | 28 MeV |
C | 8.5 MeV |
D | 7.7 MeV |
Question 105 |
The moderator used in a nuclear reactor is: (LHR 2016 Group II)
A | Cadmium |
B | Graphite |
C | Sodium |
D | Uranium |
Question 106 |
The SI unit of equivalent dose in Sievert(Sv) and
A | 1 Sv = 1Gy / RBE |
B | 1 Sv = 1Gy - RBE |
C | 1 Sv = 1Gy x RBE |
D | 1 Sv = 1Gy + RBE |
Question 107 |
Charged particles α or β and γ radiation produce fluorescenece in
A | sodium iodide |
B | Zinc sulphide |
C | all of these |
D | barium platinocynaide |
Question 108 |
Ultra violet rays can cause
A | Skin cancer |
B | severe crop damage |
C | sunburn |
D | All of these |
Question 109 |
When an α-particle collides with an atom of a gas, it knocks out
A | Positrons |
B | Neutrons |
C | Electrons |
D | Protons |
Question 110 |
The binding energy per neucleon is maximum for: (RWP 2015)
A | Iron |
B | Helium |
C | Polonium |
D | Radium |
Question 111 |
The number of neutrons in any nucleus can be given by
A | N = A + Z |
B | N = A/Z |
C | N = A - Z |
D | N = Z-A |
Question 112 |
A radioactive substance has a half life of 4 months. Three-fourth of the substance will decays in
A | 6 months |
B | 16 months |
C | 8 months |
D | 12 months |
Question 113 |
The half life of a radioactive element is given by:
A | T1/2 = 0.93/λ |
B | T1/2 = 0.693/λ |
C | T1/2 = 0.603 λ |
D | T1/2 = 0.698/λ |
Question 114 |
Nuclei having same charge number but different mass number are called
A | Isomers |
B | Isotones |
C | Isobars |
D | Isotopes |
Question 115 |
When a nucleus emits an alpha particles. Its atomic mass decreases by:
A | 3 |
B | 1 |
C | 4 |
D | 2 |
Question 116 |
β-particle is regarded as fast moving
A | electrons |
B | protons |
C | positrons |
D | neutrons |
Question 117 |
Electric and magnetic forces were unified by:
A | None of these |
B | Faraday and Maxwell |
C | Faraday |
D | Maxwell |
Question 118 |
Nuclei of different elements are identified by their
A | Nuclear number |
B | Atomic number |
C | Atomic mass number |
D | Nuclear charge |
Question 119 |
Fusion reaction takes place at high temperature because
A | Nuclei break up at high temperature |
B | Atoms are ionized at high temperature |
C | molecules break up at high temperature |
D | Kinetic energy is high enough to overcome repulsion at high temperature |
Question 120 |
A particle having the mass of electron and charge of proton is called
A | Photon |
B | Meson |
C | Lepton |
D | Positrons |
Question 121 |
In the equation, &inc; = -λ&inc; t λ is called
A | Wavelength |
B | Decaying Element |
C | Decay Constant |
D | All of these |
Question 122 |
Which of the following is energy equivalent to one microgarm (1μgm)?
A | 9 x 1010 J |
B | 9 x 107 J |
C | 9 x 107 erg |
D | 9 x 1010 erg |
Question 123 |
Half life of a radioactive element T1/2 is given by: (FSD 2015)
A | 0.693λ |
B | λ/0.693 |
C | 1/0.693λ |
D | 0.693/λ |
Question 124 |
An old unit, the rem is equal to
A | 0.001 Sv |
B | 1.0 Sv |
C | 0.01 Sv |
D | 0.1 Sv |
Question 125 |
The number of protons in any atom are always equal to its number of
A | Electrons |
B | Photons |
C | Neutrons |
D | Positrons |
Question 126 |
The activity of radioactive sample: (LHR 2016 Group II)
A | Decreases exponentially with time |
B | Is constant |
C | Increases with time |
D | Decreases linearly with time |
Question 127 |
Phophorus-32 or strontium-90 are used for the tratment of
A | All of these |
B | Blood cancer |
C | Skin cancer |
D | Bone cancer |
Question 128 |
Wilson cloud chamber is based on the principle that supersaturated vapors condense more readily on
A | Tons and dust particles |
B | Dust particles only |
C | Ions only |
D | Neither dust particles nor ions |
Question 129 |
Hydrogen atom with only one proton and one neutron in its nucleus and one electron in its orbit is called
A | Protium |
B | Deuterium |
C | None of these |
D | Tritium |
Question 130 |
Gamma rays carries a charge
A | #NAME? |
B | #NAME? |
C | no charge |
D | -2e |
Question 131 |
The LMFBR(fast reactor) reactr utilizes
A | 23992U |
B | 23592U |
C | 23492U |
D | 23892U |
Question 132 |
Total charge on any nucleus is
A | Ne |
B | Z/e |
C | Ae |
D | Ze |
Question 133 |
The number of protons in any atom are always equal to the number of: (LHR 2016 Group I)
A | Neutrons |
B | Mesons |
C | Posittrons |
D | Electrons |
Question 134 |
The building blocks of protons and neutrons are called: (LHR 2016 Group I)
A | Positrons |
B | Ions |
C | Quarks |
D | Electrons |
Question 135 |
In fusion reaction, when two deutrons are merged to form helium nucleus, the energy released is
A | 200 MeV |
B | 100 MeV |
C | 20 MeV |
D | 24 MeV |
Question 136 |
The elements showing radiactivity have atomic number Z
A | Z < 82 |
B | Z > 50 |
C | Z > 82 |
D | Z < 70 |
Question 137 |
For the treatment of skin diseases
A | &alpha-radiations are used |
B | All of these |
C | β-radiations are used |
D | γ-radiations are used |
Question 138 |
A pair of Quark and Anti Qurak makes a: (BWP 2015)
A | Hardon |
B | Lepton |
C | Baryon |
D | Meson |
Question 139 |
Half life of U-238 is: (MTN 2015 Group I)
A | 4.5 x 109 years |
B | 2.5 x 109 years |
C | 5.5 x 109 years |
D | 3.5 x 109 years |
Question 140 |
The ionization power of α-particles is
A | equal to γ-particle |
B | greater than &beta-particle |
C | Less than α -particle |
D | equal to β-particle |
Question 141 |
The dead time of G.M tube is: (SWL 2015)
A | 10-8 sec |
B | 10-6 sec |
C | 10-3 sec |
D | 10-4 sec |
Question 142 |
1u = _____________
A | 1.66 x 10-35 kg |
B | 1.66 x 10-27 kg |
C | 1.66 x 10-19 kg |
D | 1.66 x 10-31 kg |
Question 143 |
Th minimum mass of fissionable material for self-sustaining chain reactor is called
A | The atomic mass |
B | The critical mass |
C | All of these |
D | The nucelar mass |
Question 144 |
The process in which two or more light nuclei combine together to form heavier nuclei with release of energy is called
A | Chain reaction |
B | Chemical reaction |
C | Fusion reaction |
D | Fission reaction |
Question 145 |
The time required for a radioactive material to decrease in activity by one half is called
A | Half life |
B | Half time |
C | Mean life |
D | Disintegration time |
Question 146 |
The value of 1 mass = (SGD 2015 Goup II)
A | 933 MeV |
B | 934 MeV |
C | 931 MeV |
D | 932 MeV |
Question 147 |
The working principle of LMFBR (fast reactor) is to convert 23892U into
A | 23994U |
B | 23992U |
C | All of these |
D | 23592U |
Question 148 |
α, β and γ rays are emitted from a radioactive substances
A | When it is heated |
B | None of these |
C | When it is exposed to light |
D | Spontaneously |
Question 149 |
Half life of Uranium-239 is: (MTN 2015 Group II)
A | 24.5 minutes |
B | 26.5 minutes |
C | 23.5 minutes |
D | 25.5 minutes |
Question 150 |
When two deutterium nuclei fuse together to form a tritium nucleus, we get a
A | electron |
B | Alpha particle |
C | Neutron |
D | Proton |
Question 151 |
By placing Wilson cloud chamber is strong magnetic field we can get information about_________of incident particle
A | Mass |
B | all of these |
C | Energy |
D | Charge |
Question 152 |
When a nucleus emits an alpha particle, its atomic mass decreases by (GRW 2016)
A | 4 |
B | 3 |
C | 2 |
D | 1 |
Question 153 |
Gamma rays from cobalt-60 are used for the treatment of: (RWP 2015)
A | Heart attack |
B | Thyroid glands |
C | Cancer |
D | Circulation of blood |
Question 154 |
Alpha(α) particles are
A | Hydrogen nuclei |
B | Electrons |
C | Helium nuclei |
D | Photons |
Question 155 |
The isotope 11H contain
A | Two neutron |
B | No neutron |
C | One neutron |
D | Three neutron |
Question 156 |
The partilces lighter than protons are called
A | Quarks |
B | Leptons |
C | Baryons |
D | Mesons |
Question 157 |
The relation between rad and Gy is
A | 1 rad = 0.01 Gy |
B | 1 rad = 1.0 Gy |
C | 1 rad = 0.1 Gy |
D | 1 rad = 0.001 Gy |
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