Take cold water in one test tube and hot water in another test tube. Put Mg ribbon of equal mass in two test tubes.
a) In which test tube is the rate of reaction faster?
b) Which factor influence the rate of chemical reaction?Explain the reason.

Explanation

a) Test tube in which hot water is taken.
b) Temperature. When temperature increases the number of molecules with threshold energy increases. As a result the number of effective collisions increases and thus the rate of reaction also increases.