Question

1. Identify which statement(s) is/are correct. Explain what is wrong with each incorrect statement. Explain when chemical reactions continue and when they stop.

A. A chemical reaction proceeds until the enzyme molecules are all consumed.

B. A chemical reaction proceeds until the substrate molecules are all consumed.

C. A chemical reaction proceeds until equilibrium is established.

D. A chemical reaction proceeds until all the product molecules are removed.

Answer 1

A)It is not correct.An enzyme molecule catalyzes the chemical reaction ;i.e. increases the rate of tge reaction.But the reaction can take place even in the absence of catalyst ; though at a slower rate.

B)This is true.After all substrate molecules are consumed ; no more products are formed and hence no chemical reaction takes place.

C)This is not true.Chemical equilibrium is a dynamic state; not a static state.So the chemical reaction does not stop.Instead ; the rate of forward reaction becomes equal to the rate of backward reaction.

D)This is false.If all product molecules are removed ; then the forward reaction can take place.