NEET Physics Mass Energy Equivalence and Nuclear Reactions MCQs Set A

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MCQ for Full Syllabus Physics Mass Energy Equivalence and Nuclear Reactions

Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Mass Energy Equivalence and Nuclear Reactions in Full Syllabus.

Mass Energy Equivalence and Nuclear Reactions MCQ Questions Full Syllabus Physics with Answers


Question: When the number of nucleons in nuclei increases, the binding energy per nucleon

a) first increases and then decreases with increase of mass number

b) remains constant with mass number

c) decreases continuously with mass number

d) increases continuously with mass number

Answer: first increases and then decreases with increase of mass number

 

Question: The mass of an atomic nucleus is less than the sum of the masses of its constituents. This mass defect is converted into

a) energy which binds nucleons together

b) electrical energy

c) light energy

d) heat energy

Answer: energy which binds nucleons together

 

Question: Nuclear forces are

a) spin dependent and have a non-central part

b) spin independent and have no non-central part

c) spin dependent and have no non-central part

d) spin independent and have a non-central part

Answer: spin dependent and have a non-central part

 

Question: Fusion reaction occurs at temperatures of the order of

a) 107 K

b) 10 K

c) 103 K

d) 104 K

Answer: 107 K

 

Question: If 1 mg of U235 is completely annihilated, the energy liberated is

a) 9 × 1010 J

b) 9 × 1019 J

c) 9 × 1017 J

d) Nonwe of these

Answer: 9 × 1010 J

 

More Questions..........................................................

 

Question: Control rods used in nuclear reactors are made of

a) cadmium

b) graphite

c) plutonium

d) stainless steel

Answer: cadmium

 

Question: Two nucleons are at a separation of 1 fermi. The net force between them is F1 if both are neutrons, F2 if both are protons and F3 if one is proton and the other is a neutron. Then

a)

b) None of these

c)

d)

Answer:

 

Question: Which of the following statement is not true regarding Einsteins mass energy relation?

a) Mass and energy can never be related to each other

b) Mass and energy are two different forms of the same entity.

c) Energy disappears to reappear as mass

d) Mass disappears to reappear as energy

Answer: Mass and energy can never be related to each other

 

Question: The curve of binding energy per nucleon as a function of atomic mass number has a sharp peak for helium nucleus. This implies that helium

a) is very stable

b) can be used as fissionable meterial

c) is radioactive

d) can easily be broken up

Answer: is very stable

 

Question: Calculate the binding energy of a deuteron atom, which consist of a proton and a neutron, given that the atomic mass of the deutron is 2.014102 u.

a) 2.224 MeV

b) 2.014102 MeV

c) 0.002388 MeV

d) 2.16490 MeV

Answer: 2.224 MeV

 

Question: On an average, the number of neutrons and the energy of a neutron released per fission of a uranium atom are respectively

a) 2.5 and 2 MeV

b) 2.5 and 2 keV

c) 3 and l keV

d) 2 and 2 keV

Answer: 2.5 and 2 MeV

 

Question: A moderator is used in nuclear reactors in order to

a) decrease the number of neutrons

b) increase the number of neutrons

c) acceleerate the neutrons

d) slow down the speed of the nuetrons

Answer: decrease the number of neutrons

 

Question: Fusion reactions take place at high temperature because

a) kinetic enrgy is high enough to overcome repulsion between nuclei

b) nuclei break up at high temperature

c) molecules break up at high temperature

d) atoms are ionised at high temperature

Answer: kinetic enrgy is high enough to overcome repulsion between nuclei

 

Question: For a nuclear fusion process, suitable nuclei are

a) lighter nuclei

b) nuclei lying in the middle of periodic table

c) heavy nuclei

d) any nuclei

Answer: lighter nuclei

 

Question: If a star can convert all the He nuclei completely into oxygen nuclei. The energy released per oxygen nuclei is [Mass of He nucleus is 4.0026 amu and mass of Oxygen nucleus is 15.9994 amu]

a) 10.24 MeV

b) 7.6 MeV

c) 56.12 MeV

d) 23.9 MeV

Answer: 10.24 MeV

 

MCQs for Mass Energy Equivalence and Nuclear Reactions Physics Full Syllabus

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