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443 questions
In a pressurized water reactor( PWR) _____________
Light or heavy water is used as both coolant and moderator.
The coolant water boils in the reactor core.
Water is used at high pressure
Both (a) and (c).
The reason for providing the thermal shielding is to _________________
Absorb the fast neutrons
Protect the operating personnel from exposure to radiations
Prevent the reactor wall from getting heated
All of the above
The nuclear energy is measured as........
MeV
MW
Curie
None of the above
Which is the most commonly used moderator?
Graphite
Sodium
Deuterium
Heavy water
U238 will undergo fission by
Slow neutrons alone
fast neutrons alone
Either fast or slow neutrons
medium energy neutrons
The best capable alternative source which can meet the future energy demand is
thermal power plant
nuclear power plant
hydroelectric power plant
geothermal power plant
How much coal is required to generate energy equivalent to the energy generated by 1 kg of uranium?
30000 tonnes of high grade coal
300 tonnes of high grade coal
10000 tonnes of high grade coal
3000 tonnes of high grade coal
The Famous nobel lecturette speaking in the audio clip is _________.
What type of decay is shown here
23892U ---> 23490Th + 42He.
alpha
beta
gamma
What type of nuclear decay is shown here
13756Ba →→ 13756Ba + γ rays
alpha
beta
gamma
Finish this equation
20983Bi--> _______ + 20581Tl
42He
0-1e
y
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
finish the equation
22688Ra --> ____ + 22688Ra
42He
0-1e
y
finish the equation
18173Ta --> ____ + 18174W
42He
0-1e
y
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
What type of decay is shown here
23892U ---> 23490Th + 42He.
alpha
beta
gamma
What type of nuclear decay is shown here
13756Ba →→ 13756Ba + γ rays
alpha
beta
gamma
Finish this equation
20983Bi--> _______ + 20581Tl
42He
0-1e
y
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
finish the equation
22688Ra --> ____ + 22688Ra
42He
0-1e
y
finish the equation
18173Ta --> ____ + 18174W
42He
0-1e
y
Which force holds protons and neutrons together in the atom nucleus?
electric force
gravity
strong nuclear force
weak nuclear force
Which of these is an alpha particle?
A
B
C
D
Carbon-14 and carbon-12 have the same number of protons but a different number of neutrons. These different forms of the same element are called
radioactive
isotopes
nuclei
tracers
The mass number of a nucleus is equal to ______.
the number of protons plus the number of neutrons
the number of electrons
the number of protons
the number of neutrons
What type of nuclear decay is represented in this illustration?
beta decay
gamma radiation
alpha decay
nuclear fusion
Which happens in a nucleus during gamma decay?
The number of protons increases.
The number of neutrons increases.
The number of protons remains the same.
The total number of neutrons plus neutrons decreases.
When a neutron turns into a proton in a nucleus, what sort of particle is emitted?
alpha
beta
gamma
photon
Gamma rays _________.
have no mass and no charge
have mass but no charge
have no mass but have charge
have mass and charge
What are found in the nucleus of an atom?
protons and electrons
electrons and neutrons
protons, neutrons, and electrons
protons and neutrons
Protons do not repel each other in the nucleus because of the ______.
weak force
electric force
strong force
gravitational force
In a radioactive nucleus, the electric force _____ the strong force.
balances
overpowers
is overpowered by
adds to
Which of these is not a type of nuclear radiation?
alpha particles
beta particles
gamma rays
microwaves
How does the alpha decay of a nucleus cause the nucleus to change?
Only the number of protons decreases.
Only the number of neutrons decreases.
The number of neutrons and the number of protons decrease.
The number of protons increases and the number of neutrons decreases.
Which of these is a true statement about the products of the decay compared to polonium-210?
The charges are equal but the mass numbers are not equal.
The mass numbers are equal but the charges are not equal.
The mass numbers and charges are equal.
Neither the mass numbers nor the charges are equal.
A hydrogen nucleus has only one proton. How many neutrons are in a hydrogen-3 nucleus?
0
1
2
3
The three types of nuclear radiation in order of decreasing penetrating power are
alpha, beta, gamma
alpha, gamma, beta
beta, alpha, gamma
gamma, alpha, beta
Thermonuclear bomb works on the principle of:
Fission
Fusion
Both A and B
None of the above
Which article of clothing was oddly named for a nuclear testing site?
Bikini
Fedora
Cravat
Swimsuit
Nuclear medicine is a medical Specialty involving the application of radioactive substances in the diagnosis and treatment of Disease.
True
False
What dangerous byproduct is produced by nuclear power plants?
Carbon dioxide
Methane
Radioactive waste
Smoke
Which of the following country produces the most nuclear energy?
India
China
Russia
USA
Identify the famous nuclear physicist.
P. K. Iyenger
Homi J. Bhaba
Niels Bohr
James Chadwick
Identify the movie.
Krrish
PK
Parmanu
Mission Mangal
Which of the following is/are NOT true about Indian space research? (choose one or more)
ISRO was set up in 1962.
Satish Dhawan Space Centre (SDSC), SHAR is situated in Bangaluru
The first satellite launched in India was Aryabhatta.
Great scientist Dr. Vikram Sarabhai is known as the father of Indian space research.
The full form of GSLV is
Who is your favorite scientist?
A P J Abdul Kalam
C V Raman
S N Bose
Homi J Bhaba
Bikram Sarabhai
Write down three (3) applications of radioactive elements.
The current chairman of ISRO
Who among the following were the former chairman of ISRO? (More than one option may be correct)
A. S. Kiran Kumar
Ajit Kumar Mohanty
K. Radhakrishnan
G. Satheesh Reddy
Dr Vikram Sarabhai Space Centre is located in
Which equation correctly represents the alpha decay of polonium-214?
A
B
C
D
This equation shows the radioactive decay of thorium (Th). Which of the following particles is released in this reaction?
alpha
beta
neutron
gamma
it's 88 because element X gains 2 protons
it's 218 because element X loses 2 protons and 2 neutrons
it's 220 because element X loses 2 neutrons
it's 226 because element X gains 2 protons and 2 neutrons
What type of nuclear decay is shown here
13756Ba →→ 13756Ba + γ rays
alpha
beta
gamma
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
In alpha decay, the mass number...
increases by 2
decreases by 2
increases by 4
decreases by 4
In alpha decay, the atomic number...
increases by 2
decreases by 2
increases by 4
decreases by 4
The mass number of Neptunium (Np) is _____.
The atomic number of Neptunium (Np) is _____.
The atomic number of Actinium (Ac) is _____.
In beta decay, the mass number
decreases by 4.
increases by 1.
stays the same.
decreases by 2.
In beta decay, the atomic number
decreases by 2.
increases by 1.
stays the same.
decreases by 1.
Oxygen-19 produces ________________ through beta decay.
nitrogen-19
fluorine-19
carbon-14
lead-208
Carbon-14 and carbon-12 have the same number of protons but a different number of neutrons. These different forms of the same element are called
radioactive
isotopes
nuclei
tracers
The mass number of a nucleus is equal to ______.
the number of protons plus the number of neutrons
the number of electrons
the number of protons
the number of neutrons
What type of nuclear decay is represented in this illustration?
beta decay
gamma radiation
alpha decay
nuclear fusion
How does the alpha decay of a nucleus cause the nucleus to change?
Only the number of protons decreases.
Only the number of neutrons decreases.
The number of neutrons and the number of protons decrease.
The number of protons increases and the number of neutrons decreases.
A neutron changes into a proton and an electron releasing this type of particle.
alpha decay
beta decay
gamma decay
all of the above
alpha & beta decay
What type of decay is shown here
23892U ---> 23490Th + 42He.
alpha
beta
gamma
What type of nuclear decay is shown here
13756Ba →→ 13756Ba + γ rays
alpha
beta
gamma
Finish this equation
20983Bi--> _______ + 20581Tl
42He
0-1e
y
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
finish the equation
22688Ra --> ____ + 22688Ra
42He
0-1e
y
What type of decay is shown here
23892U ---> 23490Th + 42He.
alpha
beta
gamma
Finish this equation
20983Bi--> _______ + 20581Tl
42He
0-1e
y