The energy released when 1amu of mass is completely converted into energy is A. 106 M eV B. 931 M eV C. 100 M eV D. 1 M eV 7

A. 10⁶ M eV B. 931 M eV

C. 100 M eV D. 1 M eV
7. 931 M eV energy release from mass equal to

A. 1.9×10^-19 Kg B. 1.67×10^-31 Kg

C. 1.66×10^-27 Kg C. 9.1×10^-31 Kg
8. When a radioactive isotope ₈₈Ra²²⁸ decays in series by the emersion of three α particles and one β particle, The isotope finally formed is

A. ₈₃X²¹⁶ B. ₈₄X²²⁰

C. ₈₆X²²² D. ₈₈X²¹⁵
9. A radioactive nucleus ₉₂X²³⁵ decays to ₉₁ Y²³¹. Which of the following particles are emitted?

A. One α particle and one electron B. Two deutrons and one positron

C. One α particle and one proton D. One proton and four neutrons

10. α particle is bombarded on ¹⁴N as a result ¹⁷O is formed. The particle emitted is

A. neutron B. Proton

C. electron D. Positron
11. A free neutron decays to a proton but a free proton does not decay to a neutron. This is because

A. neutron is made up of electron and proton whereas proton is a fundamental particle.

B. neutron is uncharged while proton is charged

C. neutron has larger rest mass than proton

D. weak forces operate in a neutron but not in a proton