question 4\nwhat signifies a reversible chemical reaction?\na single arrow between reactants and…

question 4\nwhat signifies a reversible chemical reaction?\na single arrow between reactants and products.\na double arrow between reactants and products.\nthe presence of a catalyst.\nthe absence of any change in temperature.

question 4\nwhat signifies a reversible chemical reaction?\na single arrow between reactants and products.\na double arrow between reactants and products.\nthe presence of a catalyst.\nthe absence of any change in temperature.

Answer

Brief Explanations:

In chemical reactions, a double - arrow ($\rightleftharpoons$) between reactants and products indicates that the reaction can proceed in both the forward and reverse directions, which is the characteristic of a reversible reaction. A single arrow means a non - reversible reaction. A catalyst only affects the rate of a reaction and not whether it is reversible or not. The absence of temperature change is not a sign of a reversible reaction.

Answer:

B. A double arrow between reactants and products.