Question

1. which of the factors that affect chemical reaction rates explains why milk spoils slower when stored in the refrigerator?

a. ctalyst

b. temperature

c. Concentration

d. Surface area

2, The arte of a chemical increases with increasing concentrations of reactants because reactant molecules move faster when they are more concentrated

a. True

b. False

Answer 1

1) temperature. As temperature increases, the rate of most chemical reaction increases. At lower temperatures, the rate is low. So, milk spoils slower.

2) False. The movement of molecules is same because it depends upon the temperature and not on the concentration. As the concentration increases, the number of collisions of reactant molecules per unit volume per unit time increases and hence the rate of reaction increases.

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