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5/35 MCQs for:
MATTER: PROPERTIES AND TRANSFORMATION: Rates Of Reaction
Most catalysts increase the rate of a chemical reaction and are called __
The presence of light increases the rates of some chemical reactions. Such reactions are called __

The surface area of a solid reactant affects the rate of __.

A __ is substance which speeds up the rate of a chemical reaction but remains chemically unchanged at the end of the reaction.

A heterogeneous reaction is one in which the reactants are in __.