1. Tardigrade
  2. Question
  3. Physics
  4. Consider the following statements and state whether true or false: (i) Nuclear fission is normally followed by the emission of β - particles. (ii) Emission of α particle is normally followed by emission of γ rays. (iii) As the mass number A increases, the binding energy per nucleon in a nucleus also increases. Choose the correct order from the options given below.

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Q. Consider the following statements and state whether true or false:
(i) Nuclear fission is normally followed by the emission of $\beta ^{-}$ particles.
(ii) Emission of $\alpha $ particle is normally followed by emission of $\gamma $ rays.
(iii) As the mass number $A$ increases, the binding energy per nucleon in a nucleus also increases.
Choose the correct order from the options given below.

NTA AbhyasNTA Abhyas 2020

Solution:

(i) Nuclear fission results in fragments whose neutron/proton ratio is higher than the required value (N/P ratios is greater for heavier nuclei). To reduce the N/P ratio these fragments undergo $\beta -$ decays in which a neutron is converted into a proton.
(ii) Some of the energy generated in $\alpha -$ emission goes into nuclear excitation. The excited nucleus returns to ground state by $\gamma -$ emission.
(iii) the binding energy per nucleon in a nucleus varies in a way that depends on the actual value of $A$