All of these are likely to speed up the rate of a reaction except decreasing the surface area. increasing the temperature. increasing the pressure. adding a catalyst.

decreasing the surface area.

Explanation:

The rate of reaction or the reaction rate may be defined as the speed or the rate at which the reaction occurs. It is the speed of formation of the products from the reactants. The following factors increases the rate of reaction :

1. by adding a  catalyst

2. by increasing the temperature

3. by increasing the pressure

4. by increasing the surface area

5. by increasing concentration

Hence, decreasing the surface area of the reaction reduces the rate of reaction.

if a star is moving toward earth, its light waves appear to be squeezed together. hope it

the higher the current the higher the mag field around it the higher the influence on the compass