1. Which statement about the instantaneous rate of a reaction is not correct? a)The higher the rate, the greater is the slope of a line on a concentration-time graph of the products. b)The instantaneous rate is the slope of the tangent to a line on a concentration-time graph. c)The instantaneous rate is the slope of the secant to a line on a concentration-time graph. d)The instantaneous rate is the change in concentration of a reactant or product of a chemical reaction at a given instant. 2.Which one of the following is NOT a key concept of the collision theory: a)particles must collide in order to react b)particles must move slowly when they collide, otherwise they simply “bounce off” one another c)particles must collide with the proper orientation d)particles must collide with sufficient energy to reach the activated complex in order to react 3.The addition of a catalyst in a chemical reaction... a)ncreases the concentration of products at equilibrium. b)increases the kinetic energy of the reactants. c)lowers the activation energy of a reaction. d)lowers the enthalpy change in the overall reaction. e)decreases the kinetic energy of the reactants.
1. Which statement about the instantaneous
a)The higher the rate, the greater is the slope of a line on a concentration-time graph of the products.
b)The instantaneous rate is the slope of the tangent to a line on a concentration-time graph.
c)The instantaneous rate is the slope of the secant to a line on a concentration-time graph.
d)The instantaneous rate is the change in concentration of a reactant or product of a
2.Which one of the following is NOT a key concept of the collision theory:
a)particles must collide in order to react
b)particles must move slowly when they collide, otherwise they simply “bounce off” one another
c)particles must collide with the proper orientation
d)particles must collide with sufficient energy to reach the activated complex in order to react
3.The addition of a catalyst in a chemical reaction...
a)ncreases the concentration of products at equilibrium.
b)increases the kinetic energy of the reactants.
c)lowers the activation energy of a reaction.
d)lowers the enthalpy change in the overall reaction.
e)decreases the kinetic energy of the reactants.
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