Normally, after a chemical reaction you cannot change the products back into their starting form. ashes cannot become a log again. there are some reactions, however, that can return to their original forms. these reactions are called a. transformative b. reversible c. two-way d. regressive
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Option (B) is the correct answer.

Explanation:

A chemical reaction in which products can be changed back into the reactants is known as a reversible reaction.

For example,

On the other hand, a chemical reaction in which products are not changed back into the reactants then it is known as an irreversible reaction.

For example,

Thus, we can conclude that there are some reactions, however, that can return to their original forms. These reactions are called reversible.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: