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CBSE Questions for Class 12 Medical Physics Nuclei Quiz 6 - MCQExams.com

From the following equations, pick out the possible nuclear reactions.
  • 6C13+1H16C14+4.3MeV
  • 6C12+1H17N13+2MeV
  • 7N14+1H18O15+7.3MeV
  • 92U235+0n154X140+38Si94+20n1+γ+200MeV
Statement-I : Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and 
Statement-11: For heavy nuclei, binding energy per nucleon increases with increasing Z. while for light nuclei it decreases with increasing Z.      
  • Both the statements are true and Statement 2 is the correct explanation for Statement 1.
  • Both the statements are true but Statement 2 is not the correct explanation for Statement 1.
  • Statement 1 is true but Statement 2 is false.
  • Statement 1 is false but Statement 2 is true.
Which statement about nuclear fusion is false?
  • Nuclear fusion happens in the sun
  • Nuclear fusion is the joining of the nuclei of atoms
  • Nuclear fusion is currently used to generate electrical energy
  • Nuclear fusion can use hydrogen as fuel.
Consider the nuclear change
23793XαAβBαC
Which of the following statements is not correct?
  • Mass number of B is 233
  • Atomic number of A is 91
  • C is an isotope of A
  • B is an isobar of A
Radioactivity is generally does not found in :
  • light nuclei
  • stable nuclei
  • heavy nuclie
  • nuclei of intermediate mass
Hydrogen has________ isotopes. 
  • 2
  • 3
  • 4
  • 5
Modern atomic mass scale is based on the mass of:
  • H1
  • C12
  • C14
  • C16
Which of the following statements about radioactivity is/are true ?
  • It involves outer electrons activity
  • It is not affected by temperature or pressure
  • It is an exothermic process
  • The radioactivity of an element is not affected by any other element compounded by it
Atomic mass of an element is:
  • actual mass of one atom of the element
  • average mass of an atom of different atoms of the element
  • always a whole number
  • None of these
 Which of the following change the  activity of radioisotope ?
  • Temperature
  • Pressure
  • Chemical environment
  • None of the above
Which of the following isotopes is likely to be most stable ?
  • 7130Zn
  • 6630Zn
  • 4020Ca
  • None of these
As compared to 12C atom, 14C atom has 
  • Two extra protons and two extra electrons.
  • Two extra protons and no extra electron.
  • Two extra neutrons and no extra electron.
  • Two extra neutrons and two extra electrons.
The reaction 21H+21H32He+10n is called
  • Fusion
  • Fission
  • Endothermic reaction
  • Spontaneous reaction
Which of the following is an example of nuclear fusion reaction?
  • 23390TH+10n23490TH
  • 11348Cd+10n11448Cd+γray
  • 31H+11H42He
  • 23992U23993Np+01e
Which of the following is used icancer treatment ?
  • 13153I
  • 3215P
  • 6027Co
  • 21H
23Na is the more stable isotope of Na. By which process 2411Na can undergo radioactive decay?
  • βemission
  • αemission
  • β+emission
  • None of these
In the nuclear reaction
147N+42He178O+...............
What is the missing particle ?
  • 42He
  • 11H
  • 10n
  • γ
Which bomb works on the principle of Nuclear fusion ?
  • Atom bomb
  • Hydrogen bomb
  • Neutron bomb
  • Nuclear reactor
Fusion reaction is also known as ..........
  • Chemical reaction
  • Elastic reaction
  • Thermonuclear reaction
  • Photonuclear reaction
Pick out the isoelectronic species from the following :
(I)CH3+(II)H3O+(III)NH3(IV)CH3
  • I and II
  • III and IV only
  • I and III
  • II, III, IV
Biding energy is equal to: (m is the mass defect in amu)
  • Δm×931MeV
  • Δm×831MeV
  • Δm×1031MeV
  • Δm×731MeV
When a hydrogen bomb explodes, which of the following is used?
  • Fission
  • Fussion
  • Both
  • None of these
A natural phenomenon that supports the experimental conclusion that atoms are divisible is :
  • allotropy
  • radioactivity
  • cracking
  • none of these
Two atoms of the same element are found to have different number of neutrons in their nuclei. These two atoms are :
  • Isomers
  • lsotopes
  • Isobars
  • Allotropes
Which atom contains exactly 15 neutrons?
  • P32 (atomic number =17)
  • S32 (atomic number =16)
  • O15 (atomic number =8)
  • N15 (atomic number =7)
Mass number is denoted by:
  • D
  • S
  • A
  • Z
The difference between the sum of the masses of the constituent particles and the mass of an atom is called ___________.
  • Mass number
  • Mass defect
  • Binding energy
  • None of these
7N14 is bombarded with an (α) alfa particle to produce a proto and an unknown nucleus X, 
7N14+α (particle)  X+p
Then X stands for
  • 7N15
  • 8N14
  • 8O17
  • 8O16
Artificial radioactivity was discovered by:
  • Rontegen
  • Becquerel
  • Marie Curie
  • Irene Joliot Curie
One atomic mass unit is equivalent to
  • 1.67×1027g
  • 1.66×1027kg
  • 1.67×1027mg
  • 1.6×1024g
What are the different isotopes formed when protons combine to form a 2He4 nucleus ?
  • 1H1, 2He3
  • 2He3, 2He3
  • 1H1, 1He1
  • 2H3, 1H2
An atom bomb works on :
  • Electrical energy
  • Heat energy
  • Mechanical energy
  • Atomic energy
What is the mass defect and the binding energy of 27Co59 which has a nucleus of mass of 58.933u ? (mp=1.0078u,mn=1.0087u)
  • 517.914 MeV
  • 617.914 MeV
  • 17.914 MeV
  • 717.914 MeV
Find the binding energy per nucleon for lithium nucleus 3Li7.
Take mass of 3Li7=7u, mass of proton =1.007825u and mass of neutron =1.008665u.
Take 1u=931.5MeV.
  • 3.7MeV
  • 4.9MeV
  • 1.7MeV
  • 7.736MeV
Calculate the binding energy per nucleon for Beryllium 4Be9, its mass being 9.012 u. The masses of proton and neutron are 1.008u and 1.009u. (Take 1u=931.5MeV)
  • 8.3636  MeV
  • 7.2828 MeV
  • 9.4444 MeV
  • 6.7275 MeV
If the binding energy per nucleon for 3Li7 is 5.6MeV, the total binding energy of a lithium nucleus is?
  • 139.2MeV
  • 39.2MeV
  • 15.8MeV
  • 115.8MeV
Complete the following reaction.
13Al27+ __________   15P30+0n1
  • α
  • β
  • γ
  • 11H
Chlorine has ______isotopes.
  • 1 (one)
  • 2 (two)
  • 3 (three)
  • 4 (four)
What is the atomic mass (u) of chlorine?
  • 34
  • 35.5
  • 33
  • 35
Carbon has __________ isotopes. 
  • 1 (one)
  • 2 (two)
  • 3 (three)
  • 4 (four)
If M0 is the mass of an oxygen isotope 8O17,Mp and Mn are the masses of a proton and a neutron respectively, the nuclear binding energy of the isotope is
  • (MO8Mp)c2
  • (MO8Mp9Mn)c2
  • MOc2
  • (MO17Mn)c2
Which scientist proposed the concept of atomic mass?
  • Avogadro
  • Gay Lussac
  • Proust
  • Dalton
mp and mn are masses of proton and neutron respectively. An element of mass M has Z protons and N neutrons then:
  • M>Zmp+Nmn
  • M=Zmp+Nmn
  • M<Zmp+Nmn
  • M may be greater than less than or equal to Zmp+Nmn, depending on nature of element
If M0 is the mass of an oxygen isotope 8O17,Mp and Mn are the masses of a proton and a neutron, respectively, then the nuclear binding energy of the isotope is
  • (Mo8Mp)c2
  • (Mo8Mp9Mn)c2
  • Moc2
  • (Mo17Mn)c2
Fusion reaction takes place at high temperature because
  • KE is high enough to overcome repulsion between nuclei
  • Nuclei are most stable at this temperature
  • Nuclei are unstable at this temperature
  • None of the above
An alpha particle (4He) has a mass 4.00300 amu. A proton has a mass 1.00783 amu and a neutron has a mass 1.00867 amu respectively. The binding energy of alpha estimated from these data is closest to:
  • 27.9 MeV
  • 22.3 MeV
  • 35.0 MeV
  • 20.4 MeV
One atomic mass is equal to
  • 1.66×1027 g
  • 1.66×1024 g
  • 1.66×1023 g
  • 1.66×1025 g
When three αparticles combined to from a 12C nucleus, the mass defect is
(atomic mass of 2He4 is 4.002603 u)
  • 0.007809 u
  • 0.002603 u
  • 4.002603 u
  • 0.5 u
Fpp,Fnn and Fnp are the nuclear forces between proton-proton, neutron-neutron and neutron-proton respectively. Then relation between them is
  • Fpp=FnnFnp
  • FppFnn=Fnp
  • Fpp=Fnn=Fnp
  • FppFnnFnp
Which of the following is a fusion reaction?
  • 1H2+1H22He4
  • 1H2+1H221He2
  • 1H1+1H12He4
  • 1H1+1H22He4+n
0:0:1


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