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Chemistry MCQs Part 21

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201. Energy of activation is usually expressed in?
A. Joules
B. Calories
C. Ergs
D. Newtons

202. When the products are in lower energy state than the reactants, the reaction is?
A. Stable
B. Endothermic
C. At equilibrium
D. Exothermic

203. Two molecules with sufficient energy collide to form?
A. Activated complex
B. Reactant
C. Product
D. Intermediate

204. The minimum amount of energy that a reaction system requires to attain transition state is called?
A. Internal energy
B. Deactivation
C. Reaction energy
D. Deactivation energy

205. The value of the activation energy is much greater than average kinetic energy of the?
A. Atoms
B. Molecules
C. Reactants
D. Products

206. Once a reaction starts, heat released by activated complex provides heat to the remaining molecules for?
A. Reaction
B. Activated complex
C. Product
D. Reactant

207. For a chemical reaction the number of molecules that become activated per unit time is indicate by?
A. Velocity of molecules
B. Velocity of reaction
C. Kinetic energy
D. Potential energy

208. When molecules attain energy more than the average kinetic energy, they form?
A. Product
B. Reactant
C. Activated complex
D. Biproduct

209. The activated complex dissociates into?
A. Reactants
B. Products
C. Catalyst
D. Intermediates

210. Only an effective molecular collision can result in the formation of a?
A. Product
B. Intermediate
C. Reactant
D. Activated complex

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