Chemistry MCQs Part 19

chemistry mcqs for mcat and ecat
181. At equilibrium the rate of disappearing of reactants and the rate of formation of products are?
A. Equal
B. Different
C. Very different
D. Almost equal

182. The change of concentrations of reactants and products with time is called?
A. Rate of equilibrium
B. Forward rate
C. Rate of reaction
D. Backward rate

183. When at equilibrium there is no motion what so ever, it is called?
A. Dynamic
B. Permanent
C. Dead
D. Static

184. All types of chemical equilibra and equilibra between physical states are called?
A. Static
B. Dynamic
C. Permanent
D. Temporary

185. At equilibrium, as long as the volume of the container and the temperature of the chemical system remains unchanged, the concentrations of reactants and products?
A. Changes
B. Keep on changing
C. Do not change
D. Is fixed

186. At the beginning the concentrations of reactants and products change?
A. Sharply
B. Rapidly
C. Slowly
D. Smoothly

187. The concentrations of the active masses of the reacting species and the rate of reaction are?
A. Related
B. Interdependent
C. Independent
D. Not related

188. Law of mass action was put forward by?
A. Waage
B. Einstin
C. Guldberg
D. Goldberg and wage

189. The rate at which a chemical reaction proceeds and the product of the active masses of the reacting substances are?
A. Directly related
B. Indirectly related
C. Related
D. Not related

190. A homogeneous mixture of two or more than two substance whose proportions can be varied within certain limits is called?
A. Solution
B. Mixture
C. Element
D. Compound