Test Bank for Organic Chemistry, 4th Edition by Klein, 9781119659594, Covering Chapters 1-27 Includes Rationales

Chapterg1


MULTIPLEgCHOICEgQUESTIONS

Topic:gAtomicgOrbitals

1. Ingquantumgmechanicsgagnodeg(nodalgsurfacegorgplane)gis:
A) agplacegwhereggisgnegative.
B) agplacegwhereggisgpositive.
C) agplacegwheregg=g0.
D) agplacegwhereg2gisglarge.
E) agplacegwhereg2gisgnegative
.gAns:g C

Topic:gAtomicgOrbitals,gMoleculargOrbitals

2. Whengtheg1sgorbitalsgofgtwoghydrogengatomsgcombinegtogformgaghydrogengmolecul
e,ghowgmanygmoleculargorbitalsgaregformed?
A)g 1
B)g 2
C)g 3
D)g 4
E)g 5
Ans:g Bg Topi

c:gAtomicgOrbitals

3. Whichgprinciple(s)gorgrulegmustgbegusedgtogdeterminegthegcorrectgelectronicgconfiguratio
ngforgcarbongingitsggroundgstate?
A) AufbaugPrinciple
B) Hund'sgRule
C) PauligExclusiongPrinciple
D) (A)gandg(B)gonly
E) Allgthree
gAns:g E




1

, Chapterg1


Topic:gAtomicgOrbitals,gBonding

4. Whatgpointgongthegpotentialgenergygdiagramgbelowgrepresentsgthegmostgstablegstategfo
rgtheghydrogengmolecule?




A) I
B) II
C) III
D) IV
E) V
Ans:g g C

Topic:gAtomicgOrbitals,gMoleculargOrbitals

5. Accordinggtogmoleculargorbitalgtheory,gwhichgmoleculegcouldgnotgexist?
A) H2
B) He2
C) Li2
D) F2
E) N2
Ans:g g B

Topic:gAtomicgOrbitals,gMoleculargOrbitals

6. Whengtheglsgorbitalsgofgtwoghydrogengatomsgcombinegtogformgaghydrogengmolecul
e,gwhichgmoleculargorbitalsgaregformed?
A) Onegbondinggmoleculargorbitalgonly
B) Twogbondinggmoleculargorbitals
C) Onegbondinggmoleculargorbitalgandgonegantibondinggmoleculargorbital
D) Twogantibondinggmoleculargorbitals
E) Threegbondinggmoleculargorbitals
gAns:g C




2

, Chapterg1


Topic:gAtomicgOrbitals,gHybridization

7. Thegfollowinggelectrongconfigurationgrepresentsg .


1s 2sp3 2sp3 2sp3 2sp3
A) theggroundgstategofgboron.
B) thegsp3ghybridizedgstategofgcarbon.
C) thegsp3ghybridizedgstategofgnitrogen.
D) theggroundgstategofgcarbon.
E) angexcitedgstategofgcarbon.
gAns:g C


Topic:gAtomicgOrbitals,gMoleculargOrbitals

8. Accordinggtogmoleculargorbitalgtheory,gingthegcasegofgagcarbon-
carbongdoublegbond,gthegcarbon-
carbongbondinggelectronsgofghighergenergygoccupygthisgmoleculargorbital.
A) gbondinggMO
B) gbondinggMO
C) *gantibondinggMO
D) *gantibondinggMO
E) *gbondinggMO
gAns:g B


Topic:gAtomicgOrbitals,gHybridization

9. IdentifygthegatomicgorbitalsgingthegC-Cgsigmagbondgingethyne.
A) (2sp2,g2sp2)
B) (2sp3,g2sp3)
C) (2sp,g2sp)
D) (2p,g2p)
E) (2sp,g1s)
gAns:g g
C




3

, Chapterg1


Topic:gLewisgStructures,gFormalgCharges

10. Listedgbelowgaregelectrongdotgformulasgforgseveralgsimplegmoleculesgandgions.g Allgvale
ncegelectronsgaregshown;ghowever,gelectricalgchargesghavegbeengomittedgdeliberately.
H H H H
.. .. .. .. g
Hg:gBeg:gH Hg:gBg:gH Hg:gNg:gH Hg:gNg:gH Hg:gOg:gH
.. .. .. .. g
H H
I II III IV V

Whichgofgthegstructuresgactuallygbear(s)gagpositivegcharge?
A) I
B) II
C) III
D) IIIg&gV
E) IVg&gV
Ans:g g E

Topic:gLewisgStructures,gFormalgCharges

11. Whatgis.t.hegformalgchargegongoxygengingthegfollowinggstructure?
H3C O

CH3

gCH3



A)g +2
B)g +1
C) 0
D) -1
E) -2
Ans:g g B




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