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

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1. 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

16.1 MeV

2.16 MeV

216 MeV

2. 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

21.6 MeV

0.216 MeV

216 MeV

3. Nuclear fission take place in

Moderate nuclei

Heavy Nuclei having more B.E./Nucleon

Lighter nuclei

Heavy nuclei having less B.E/Nucleon

4. 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

attractive, attractive

repulsive, attractive

repulsive, repulsive

5. Nuclear fusion take place in

Heavy nuclei having less B.E/Nucleon

Light nuclei having less B.E/Nucleon

Light nuclei having more B.E/Nucleon

Heavy Nuclei having more B.E/Nucleon

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

Charge independent

Short range

saturation character

Attractive

7. 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]

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

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

8. Energy equivalent of 1u in MeV/c²

0.9315

93.15

9.315

931.5

9. 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

10. Which one has the higherst Binding Energy /Nucleon

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

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