MDCAT Physics Chapter 13 online mcq test with answers for chapter 13 (Deformations of Solids)

MDCAT Physics Chapter 13 Nuclear Physics of Solids Online Test

Sr. #	Questions	Answers Choice
1	Half-life of radon gas is:	1620 years 3.8 days 7 days 11 days
2	Nuclear fission experiments show that the neutrons the uranium nuclei into two fragment of about the same size. This process is accompanied by the emission of several:	Protons and positrons 𝛼 −partilces neutrons Protons and 𝛼 −partilces
3	The example of nuclear fusion is:	Formation of barium and krypton from uranium Formation of plutonium -235 from uranium -235 Formation of helium from hydrogen Formation of water from hydrogen and oxygen
4	𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:	Spontaneously When it is put in a reactor When it is heated Under pressure
5	A radioactive substance has a half-life of 4 months. Three-fourths of the substance will decay in:	5months 6months 8months 7months
6	For atomic nucleus, the binding energy per nucleon with increase in mass number:	Increases continuously Remains same Decrease continuously First increases and then decreases with increase in mass number
7	A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:	20min 60min 80min 90min
8	The phenomenon of radioactivity is associated with:	Fission of nucleus Disintegration of neutrons Emission of spectral lines Spontaneous disintegration of the nuclei of atoms
9	The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:	Isotopes Isobars Isomers Isodiapheres
10	The activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:	0.8 Curie 0.1Curie 0.4 Curie 0.16 Curie
11	In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :	140days 45days 87days 90days
12	A radioactive isotope 𝟐𝟑𝟖 𝑼 decays consecutively to 𝟐𝟑𝟒 𝑼 the particles emitted are:	One 𝛼 and one 𝛽 Two 𝛼 and one 𝛽 e 𝛼 and two 𝛽 Two 𝛼 and two 𝛽
13	The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 − 𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:	90, 238 91, 234 92, 236 92, 238
14	A radioactive nucleus can emit:	Electron 𝛼 particles Positron Any of these
15	Which of the following have maximum ionization power?	𝛼 −rays 𝛽 −rays 𝛾 −rays Same for all
16	Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:	Mass of the nucleus increases Mass of the nucleus decreases Charge on the nucleus increases Charge number decreases
17	The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:	12days 10days 22days 36days
18	The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:	1.75 days 3.5 days 7 days 14 days
19	If the radioactive substance reduces to 𝟏 𝟏𝟔 PHYSICS of its original mass in 40 days then its half-life is:	10days 20days 40days 4days

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