Question

Which of the following is a true statement relating reaction rates? Select one: O a. the higher the concentration of reactants, the lower the reaction rate O b. calatyst increases reaction rate by increasing activation energy c. inhibitors decrease reaction rate d. temperature does not affect reaction rates

Answer 1

Ans:

a) The higher the concentration of reactants, the lower the reaction rate: False , Because The higher the concentration of reactants, higher is the chance of collisions of reactants and so the higher the rate of reaction.

b) Catalyst increases reaction rate by increasing activation energy: False, Because catalyst increases reaction rate by decreasing activation energy

C) Inhibitors decreases reaction rate :True, Inhibitor decreases reaction rate by inhibiting conversion.

d) temperature does not affect reaction rate: False, Because as temperature increases, rate of collision between reactants increases and hence rate of reaction increases.

So Ans is statement (c) is true

Answer 2

ANSWER :

Option a  is false. Higher concentration increases reaction rate.

Option b is false. Catalyst increases reaction rate by lowering the activation energy.

Option c is true. Inhibitors restrict reaction and so reaction rate decreases.

Option d is false. Higher temperature creates more aggressive movements and hence reaction rate is 

definitely affected.

Therefore, answer is : Option c is TRUE.