Question

what are the main factor affecting the rate of reaction​

Answer 1

Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

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Answer 2

$\huge\mathfrak\red{Answer :) }$

Several factors can influence the chemical reaction rate. In general, a factor that increases the number of collisions between particles will increase the reaction rate and a factor that decreases the number of collisions between particles will decrease the chemical reactionrate.