Substance A has a melting point of 80 degrees celsius and substance B has a melting point of 69 degrees celsius. If you start with pure A and add larger percentages of B what woud happen to the melting point at 0% B, at 10% B, at 50% B, at 90% B, at 100% B, (Describe the general process, no need to state exact melting points.)

it would not melt at a specific point

Explanation:

becuase it is not pure

Answer : The correct option is, (A) by increasing the temperature of the reactants  

Explanation :

Rate of a reaction : It is defined as the speed at which the reactants are converted into the products.

Rate of a reaction can be increases by many ways :

(1) By increasing the temperature of the reactants

(2) By increasing the concentration of reactants

(3) By increasing the surface area of the reactants

(4) By adding the catalyst in the reaction

(5) By increasing the pressure of the reacting gases

Hence, the rate of reaction can be increased by by increasing the temperature of the reactants.