FlexiQuiz - QUIZ 2-NUCLEI (NUCLEAR FORCE AND B.E.)

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1. A heavy nucleus X of mass number 240 and binding energy per nucleon 7.6 MeV is split into two fragments Y and Z of mass numbers 110 and 130. The binding energy of nucleons in Y and Z is 8.5 MeV per nucleon. Calculate the energy Q released per fission in MeV.

2.16 MeV

0.216 MeV

21.6 MeV

216 MeV

2. Nuclear fission take place in

Moderate nuclei

Lighter nuclei

Heavy Nuclei having more B.E./Nucleon

Heavy nuclei having less B.E/Nucleon

3. Properties of nuclear forces:

charge independent i.e. same between p and n or between p and p or between n and n.

short-range forces can act within 10^-15m

strongest i.e. a huge energy is required to divide a nucleus into its constituents.

saturation character i.e. they abruptly become zero as the inter-nucleon distance is increased to a certain value (about 10^–14 m). Therefore, nuclear forces do not increase with the increase in the number of nucleons.

Non central forces

All of the above

4. Energy equivalent of 1u in MeV/c²

0.9315

9.315

93.15

931.5

5. Consistency of B,E/Nucleon in the middle of the curve indicates which two properties of the nuclear force.

Charge independent

saturation character

Short range

Attractive

6. A nucleus with mass number A = 240 and BE/A = 7.6 MeV breaks into two fragments each of A = 120 with BE/A = 8.5 MeV. Calculate the released energy.

0.9 MeV

2.16 MeV

16.1 MeV

216 MeV

7. Nuclear force is ________________ for the distances larger than 0.8 fm and _______________ if the distance is less than 0.8 fm between the nucleons.

attractive, repulsive

repulsive, attractive

attractive, attractive

repulsive, repulsive

8. Which one has the higherst Binding Energy /Nucleon

9. If Mp is the mass of a proton,Mn is the mass of neutron and M is the actual mass of a nuclerus, then for a nucleus _ZX^A , formula to calculate mass defect is

[zMp + Mn ] - M

[zM_p+ (A-Z)M_n] - M

[zM_p+ (A-Z)M_n]

[M_p+ (A-Z)M_n] - M

10. Nuclear fusion take place in

Heavy nuclei having less B.E/Nucleon

Light nuclei having more B.E/Nucleon

Light nuclei having less B.E/Nucleon

Heavy Nuclei having more B.E/Nucleon

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QUIZ 2-NUCLEI (NUCLEAR FORCE AND B.E.)

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