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Q.

(A) : The BE per nucleon of the fused heavier nuclei is more than the B.E per nucleon of the lighter nuclei .
(R) : The final system is more tightly bound to the initial system.

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a

(A) is true but (R) is false

b

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

c

Both (A) and (R) are false

d

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

answer is B.

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Detailed Solution

In fusion reaction, lighter nuclei with lower BE per nucleon fuse to form heavier nucleus with larger BE per nucleon and releases energy.

Final nucleus is more stable than fusing nuclei , it is more tightly bounded.

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

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(A) : The BE per nucleon of the fused heavier nuclei is more than the B.E per nucleon of the lighter nuclei .(R) : The final system is more tightly bound to the initial system.