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chapter 3-orgchem

Total questions: 71

Worksheet time: 37mins

Name
Class
Date
1.

bond cleavage reaction for ions

a)

homorolytic

b)

heterolytic

2.

bond cleavage reaction for radicals

a)

homorolytic

b)

heterolytic

3.

left side of the equation is _____ centered free radical

a)

carbon

b)

hydrogen

4.

right side of the equation is ________ centered radical

a)

carbon

b)

hydrogen

5.

which has the shortest life

a)

radical

b)

carbanion

c)

carbene

d)

carbocation

6.

which has the longest life

a)

radical

b)

carbanion

c)

carbene

d)

carbocation

7.

which has the second longest life

a)

radical

b)

carbanion

c)

carbene

d)

carbocation

8.

which is an acid

a)

carbanion

b)

carbocation

c)

radical

d)

carbene

9.

which is an lewis base

a)

carbanion

b)

carbocation

c)

radical

d)

carbene

10.

which is neutral

a)

carbanion

b)

carbocation

c)

radical

d)

carbene

11.

which is a weak acid

a)

carbanion

b)

carbocation

c)

radical

d)

carbene

12.

available energy

a)

entropy

b)

gibbs free energy

c)

gibbs energy

d)

enthalpy

13.

in gibbs free energy <0 would mean it is a ___________ reaction

a)

equilibrium

b)

neutral

c)

spontaneous

d)

non-spontaneous

14.

equation for gibbs free energy

a)

ΔG= ΔH-TΔS

b)

ΔG= ΔH+TΔS

c)

ΔH= ΔG-TΔS

d)

ΔG= ΔH-SΔT

15.

enthalpy

a)

total energy

b)

partial energy

c)

disorder of system

d)

available energy

16.

disorder of a system

a)

gibbs free energy

b)

enthalpy

c)

entropy

17.

ΔG >

a)

endergonic

b)

exergonic

c)

equilibrium

d)

exothermic

18.

ΔG <

a)

endergonic

b)

exergonic

c)

equilibrium

d)

exothermic

19.

ΔG = 0

a)

endergonic

b)

exergonic

c)

equilibrium

d)

exothermic

20.

is the study of the energy changes that accompany chemical and physical transformations

a)

thermodynamics

b)

kinetics

21.

study of reaction rates

a)

thermodynamics

b)

kinetics

22.

step by step description of how a reaction happens

a)

mechanics

b)

rate law

23.

the relationship between the concentrations of the reactants and the observed reaction rate

a)

mechanics

b)

rate law

24.

determined experimentally

a)

mechanics

b)

rate law

25.

the number of molecules of that reactant which represent in the rate-determining step

a)

rate law

b)

order

c)

mechanics

26.

exothermic

a)

heat is absorbed

b)

heat is released

c)

-ΔH

d)

+ΔH

27.

endothermic

a)

heat is absorbed

b)

heat is released

c)

-ΔH

d)

+ΔH

28.

what kind of reaction is this

a)

exergonic

b)

endergonic

29.

what kind of reaction is this

a)

exergonic

b)

endergonic

30.

minimum kinetic energy needed to react

a)

Ea

b)

Eact

c)

Eacc

d)

E

31.

which of the following has p-orbital

a)

carbanion

b)

free radical

c)

carbocation

d)

carbene

32.

which is the most stable of the following based on stability of carbocation and radicals

a)

secondary

b)

tertiary

c)

primary

d)

methyl

33.

which is the second most stable of the following based on stability of carbocation and radicals

a)

secondary

b)

tertiary

c)

primary

d)

methyl

34.

which is the least stable of the following based on stability of carbocation and radicals

a)

secondary

b)

tertiary

c)

primary

d)

methyl

35.

bond ________ requires energy (+BDE)

a)

dissociation

b)

formation

36.

bond ________ releases energy (-BDE)

a)

dissociation

b)

formation

37.

what kind of BDE of free radical is this

a)

formation of methyl radical

b)

formation of primary radical

c)

formation of secondary radical

d)

formation of tertiary radical

38.

what kind of BDE of free radical is this

a)

formation of methyl radical

b)

formation of primary radical

c)

formation of secondary radical

d)

formation of tertiary radical

39.

what kind of BDE of free radical is this

a)

formation of methyl radical

b)

formation of primary radical

c)

formation of secondary radical

d)

formation of tertiary radical

40.

what kind of BDE of free radical is this

a)

formation of methyl radical

b)

formation of primary radical

c)

formation of secondary radical

d)

formation of tertiary radical

41.

which of the following has trigonal planar geometry

a)

carbocation

b)

free radicals

c)

carbenes

d)

radicals

42.

which of the following has trigonal pyramid geometry

a)

carbocation

b)

free radicals

c)

carbenes

d)

radicals

43.

which of the following has linear or bent geometry

a)

carbocation

b)

free radicals

c)

carbenes

d)

radicals

44.

are nucleophilic and basic

a)

carbocation

b)

free radicals

c)

carbanion

d)

carbene

45.

carbon is neutral

a)

carbocation

b)

free radicals

c)

carbanion

d)

carbene

46.

donation of electron density along the sigma bonds

a)

inductive effect

b)

hyperconjugation

47.

overlap of sigma bonding orbitals with empty p orbital

a)

inductive effect

b)

hyperconjugation

48.

more highly substituted carbocations are ____ stable

a)

less

b)

more

49.

electron deficient

a)

carbocations

b)

carbanions

c)

radicals

d)

carbenes

50.

electrophilic strong acids

a)

carbocations

b)

carbanions

c)

radicals

d)

carbenes

51.

nucleophilic strong bases

a)

carbocations

b)

carbanions

c)

radicals

d)

carbenes

52.

both nucleophilic and electrophilic

a)

carbocations

b)

carbanions

c)

radicals

d)

carbenes

53.

the highest point in the graph

a)

activation energy

b)

reactive intermediates

c)

rate determining step

d)

transition state

54.

the energy difference between the reactants and the transition state.

a)

activation energy

b)

reactive intermediates

c)

rate determining step

d)

transition state

55.

carbocation, carbanion, free radicals, carbenes

a)

activation energy

b)

reactive intermediates

c)

rate determining step

d)

transition state

56.

____ reactions have transition states, ____ exceptions

a)

all; some

b)

some; no

c)

some; some

d)

all; no

57.

which is used in organic chemistry

a)

ΔH

b)

ΔG

58.

which is used in biochemistry

a)

ΔH

b)

ΔG

59.

lowest point in a graph

a)

transition

b)

intermediate

60.

The reaction step with the highest Ea will be the _______ step and will determine the rate at which the reaction proceeds

a)

fastest

b)

slowest

61.

transition state resembles the product

a)

endothermic

b)

exothermic

62.

transition state resembles the reactant

a)

endothermic

b)

exothermic

63.

first step in free radical chain reaction

a)

initiation

b)

termination

c)

propagation

64.

second step in free radical chain reaction

a)

initiation

b)

termination

c)

propagation

65.

last step in free radical chain reaction

a)

initiation

b)

termination

c)

propagation

66.

The intermediate reacts with a stable molecule to produce another reactive intermediate (and a product molecule).

a)

initiation

b)

termination

c)

propagation

67.

are side reactions that destroy the reactive intermediate.

a)

initiation

b)

termination

c)

propagation

68.

generates a radical intermediate

a)

initiation

b)

termination

c)

propagation

69.

An electron-rich molecule or ion that is capable of donating a pair of electrons

a)

nucelophile

b)

electrophile

70.

An electron-deficient molecule or ion that is capable of accepting a pair of electrons

a)

nucleophile

b)

electrophile

71.

The ability of an atom or molecule to distribute its electron density unevenly in response to external influences

a)

polarizability

b)

polarization

c)

polarized

d)

polar

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