Which statements describe what happens in a redox reaction? check all that apply. a. electrons move from one substance to another. b. one atom gains electrons and one loses electrons. c. the cations on two substances trade places. d. there are two oxidation reactions.

The correct answers are Option A and Option B.

Explanation:

Oxidation-reduction reaction or redox reaction is the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is the reaction in which an atom looses its electrons. The oxidation state of the atom increases.

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation state of the atom gets reduced.

In a redox reaction, one atom gain electron and another atom looses electron or it can also be said that electrons are transferred from one substance to another substance.

Thus, the correct answers are Option A and Option B.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.