Which one of the following statements is correct about the difference(s) between chemical and nuclear reactions?

• A. A nuclear reaction results in the release of huge amounts of energy while chemical reactions always absorb energy.
• B. A chemical reaction results in a change in entropy while nuclear reactions do not result in a change in entropy.
• C. A chemical reaction does not follow the law of conservation of mass while a nuclear reaction does.
• D. Both are very similar in nature except a nuclear reaction results in the release of some extra heat.
• E. Nuclear reactions result in the change in identities of the reactants while elemental identities are preserved in chemical reactions.

Answer: (E)