Question

Assertion : Hydrogen nuclei combine to form helium nuclei and energy is released.

Reason : Binding energy/nucleon of He is greater than hydrogen.

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

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

(c) A is true but R is false  

(d) A and R are false

Answer 1

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

Explanation:

A nuclear reaction in which two lighter nuclei are fused together to form a heavier nuclei is called nuclear fusion. In such a process, more stable nuclei come into existence and binding energy per nucleon increases. Fusion reactions are highly exothermic because of loss of mass during fusion.