1)Which of the following statements is true? a)catalysts help to cancel intermed

ID: 850062 • Letter: 1

Question

1)Which of the following statements is true?

a)catalysts help to cancel intermediates from the reaction mechanism

b)Catalysts lower the activation energy by altering the rate determining step

c)Catalysts increase molecular velocities of the reactants

d)catalysts increase deltaH for a reaction

e)Catalysts are required for a reaction to be an elementary step

2)In a second order reaction, the half life of the reaction

a)grows exponentially

b)is inversely proportional to the temperature in Kelvin

c)is directly proportional to the concentration in Moles/L

d)doubles every time the concentration is reduced by 50%

e)remains constant

3)In a first order reaction, the half-life of the reaction:

a)grows exponentially

b)is inversely proportional to the temperature in Kelvin

c)is directly proportional to the concentration in Moles/L

d)doubles every time the concentration is reduced by 50%

e)remains constant

1)Which of the following statements is true?

a)catalysts help to cancel intermediates from the reaction mechanism

b)Catalysts lower the activation energy by altering the rate determining step

c)Catalysts increase molecular velocities of the reactants

d)catalysts increase deltaH for a reaction

e)Catalysts are required for a reaction to be an elementary step

2)In a second order reaction, the half life of the reaction

a)grows exponentially

b)is inversely proportional to the temperature in Kelvin

c)is directly proportional to the concentration in Moles/L

d)doubles every time the concentration is reduced by 50%

e)remains constant

3)In a first order reaction, the half-life of the reaction:

a)grows exponentially

b)is inversely proportional to the temperature in Kelvin

c)is directly proportional to the concentration in Moles/L

d)doubles every time the concentration is reduced by 50%

e)remains constant

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