Organic Chemistry Multiple Choice Questions and Answers – Rate of Reaction

Questions
1 The rate of the reaction is equal to the product of three factors listed below except ____________
A Collision frequency
B Energy factor
C Orientation factor
D pH factor

Answer: pH factor
2 Temperature and pressure are the only factors which affect the reaction rate.
A True
B False

Answer: False
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3 The frequency of molecular collision increases if ____________
A The concentration of product increases
B The concentration of product decreases
C The concentration of reactant increases
D The concentration of reactant decreases

Answer: The concentration of reactant increases
4 Identify the true statement regarding catalyst.
A Always decreases the rate of the reaction
B Always increases the activation energy of the reaction
C Actually participates in the reaction
D Changes the equilibrium concentration of the product

Answer: Actually participates in the reaction
5 From the choices given below, identify the activation energy of a reaction whose rate constant increases by 100 when the temperature changes from 300K to 360K.
A 53
B 69
C 35
D 42

Answer: 69
6 Identify the unit of “k” in moles/L for the rate law: k[A][B]pow2.
A L/mol/s
B L(pow2)/mol/s
C L(pow2)* s(pow2)/mol(pow2)
D s

Answer: s
7 Which among the following catalyst increases the rate of the reaction?
A Calcium carbonate
B Calcium chloride
C Calcium hydroxide
D Calcium sulphate

Answer: Calcium carbonate
8 Which is not a type of catalyst?
A Positive catalyst
B Negative catalyst
C Autocatalyst
D Homogeneous catalysis

Answer: Homogeneous catalysis
9 What is the speed of a chemical reaction?
A Is independent of the contact surface
B Is constant no matter what the temperature is
C Varies inversely with the absolute temperature
D Is extremely rapid between the ions in aqueous solution

Answer: Is extremely rapid between the ions in aqueous solution
10 The overall order for the reaction 2A+ B—> 2C with rate equation rate=k[A]^2[B] is?
A 0
B 1
C 2
D 3

Answer: 3

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