fQuestion: 2.Fission is a nuclear process in which small nuclei are combined int
ID: 902422 • Letter: F
Question
fQuestion:
2.Fission is a nuclear process in which small nuclei are combined into larger nuclei, releasing energy.
True
False
3.Which of the following isotopes is used for irradiation of food?
Thorium-228
Plutonium-238
Cobalt-60
Uranium-233
Iodine-131
4.An isotope undergoes beta decay. The daughter nucleus will have
a lower atomic number than the parent nucleus
an atomic number twice as high as the parent nucleus
the same atomic number as the parent nucleus
a higher atomic number than the parent nucleus
5.
What role does cadmium metal (Cd) play in a nuclear reactor?
transfers heat from the condenser to the environment (cooling tower)
slows down the fission neutrons (moderator)
undergoes fission (fuel rods)
controls chain reaction (control rods)
transfers heat from the reactor to the heat exchanger (primary coolant)
6.Which type of radiation is best suited for external radiation therapy
gamma
beta
neutron
alpha
7.Which of the following daughter isotopes will be produced after the radioactive decay of actinum-227 by alpha particle emission?
Polonium-218
Astatine-211
Thorium-226
Francium-223
Radium-226
8.Complete the following equation:235/92U---------->4/2He +.............
a) 231/90 Th
b) 231/91Pa
c)235/93 Np
d)235/92 U
e)236/93 Np
9.Alpha particles are identical to
helium nuclei.
hydrogen atoms.
electrons.
helium atoms.
protons.
10.Which of the following is an advantage of nuclear power plants over coal-burning plants? Nuclear plants:
form numerous radioactive fission products.
use more fuel.
produce more thermal pollution than coal plants.
do not pollute the air with SO2, soot, and fly-ash.
11.
Which type of nuclear process requires an extremely high temperature (millions of degrees)?
alpha decay
beta decay
positron emission
fission reaction
fusion reaction
12.If a sample of nobelium has an activity of 32 Ci and if the half-life of nobelium is 102 s, then in how much time will its activity become 4 Ci?
120 s
205 s
405 s
287 s
306 s
13.Radioactive elements are used for:
medical treatment.
determining age of fossils and rocks.
all of the above
medical diagnosis.
generating electricity.
15.Protactinium-231 is produced as a daughter isotope after the radioactive decay of _____ by alpha particle emission.
neptinium-235
plutonium-238
uranium-232
Americium-241
curium-243
Explanation / Answer
Posted the first four answer, please split the problems into multiple question.
2) The statement is FALSE, since in fission, one bigger nuclei will dissociate into two smaller nuclei, the above statement is correct for Nuclear Fusion
3) The correct answer is Option C, Cobalt-60 is used for the irridation process
4) The correct answer is Option D, The atomic number of daughter nucleus will be one more than the parent nucleus
5) The correct answer is Option D, controls chain reaction by controlling the rods
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