(A) : Energies associated with nuclear processes are about a million times larger than chemical process.
(R) : In the mass number range A = 30 to 170, the B.E per nucleon is nearly constant about 8 MeV/nucleon.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is B.

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Detailed Solution

Nuclear reactions change the energy levels of bound neutrons and protons while chemical reactions change the energy levels of bound electrons. Hence, Energies associated with nuclear processes are about a million times larger than chemical process.

The nuclear force will weaken as the distance between nucleons grows for medium and large-sized nuclei. This will lead to a saturation in the nuclear force per nucleon for small and large size nuclei ( between 30 and 170).

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