Which statement describes a chemical reaction? reactants form products when atoms change state. products form reactants when atoms change state. reactants form products when atoms are rearranged. products form reactants when atoms are rearranged.

The answer you are looking for is Statement C

In a chemical reaction when the atom of the reactant rearranges, it leads to the formation of product.

Chemical reaction refers to schematic representation of combination of chemicals which leads to the formation of new compound. It has two important factors called reactant and product. The former either dissociates or associates which leads to the formation of latter.  

During a chemical reaction, the molecules or the atoms in the reactants adjust themselves and bond together contrastingly to shape new products with unexpected qualities in comparison to the reactants. Thus, statement C is considered as best choice for the given question.  

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.