Question

Which of the following is the best description of a chemical reaction? A. When molecules of a substance move slowly enough, they link together to form a crystalline structure. B. When two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances. C. When two molecules collide with enough force, they shatter into individual atoms. Later, these atoms join up in new combinations to form new substances. D. When two atoms collide with enough force, their nuclei fuse together, forming new substances and releasing tremendous amounts of energy.

Answer 1

A would be the best answer for bes desc. of a CHEMX

Answer 2

Answer: Option (B) is the correct answer.

Explanation:

A chemical reaction is defined as the reaction in which two or more molecules collide together that results into breakage of old bonds and formation of new bonds due to which there occurs formation of new compounds.

For example, $NaOH + HCl \rightarrow NaCl + H_{2}O$

Basically, a chemical reaction changes the identity of reactant species.

Thus, we can conclude that the statement when two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances, is the best description of a chemical reaction.