Chem 1211 Final Exam Review
Questions with complete solution
2025
They type of compound that is most likely to contain a covalent bond is
_______________________.
A) one that is composed of a metal form the far left of the periodic table and a
nonmetal from the far right of the periodic table.
B) a solid metal
C) one that is composed of only nonmetals
D) held together by the electrostatic forces between oppositely charged ions.
E) there is no general rule to predict covalency in bonds. - correct answers C)
one that is composed of only non metals.
In which of the molecules below is the carbon-carbon distance the shortest?
A) H2C--CH2
B) H-C---C-H
C) H3C-CH3
D) H2C--C--CH2
E) H3C-CH2-CH3 - correct answers B) H-C---C-H
The Lewis Structure of N2H2 shows__________________.
A) a nitrogen-nitrogen triple bond
B) a nitrogen-nitrogen single bond
C) each nitrogen has one nonbonding electron pair
D) each nitrogen has two nonbonding electron pairs
,E) each hydrogen has one nonbonding electron pair - correct answers C)
each nitrogen has one nonbonding electron pair
The oxidation number of iron is Fe2O3 is ______________.
A) -2
B) +1
C) +3
D) +2
E) -3 - correct answers C) +3
The formal charge on sulfur is SO4-2 is _________, where the Lewis structure
of the iron is:
A) -2
B) 0
C) +2
D) +4
E) -4 - correct answers B) 0
The Lewis Structrue of CO3-2 iron is ________________. - correct answers
A valid Lewis Structure of _________ cannot be drawn without violating the
octet rule.
A) NF3
B) IF3
C) PF3
D) SbF3
E) SO4-2 - correct answers B) IF3
, The central atom in ________ does NOT violate the octet rule.
A) SF4
B) KrF2
C) CF4
D) XeF4
E) ICl4- - correct answers C) CF4
Given the average bond energies for C-H and C-Br bonds are 413 and 267
kJ/mol, respectively, the heat of atomization of bromoform (CHBr3) is
_________ kJ/mol.
A) 1241
B) 689
C) -689
D) 1378
E) -1378 - correct answers A) 1241
C-H=413
C-Br=276
*3
= 828
828 + 413 = 1241
Of the bonds C-C, C--C, C---C, the C-C bond is ___________.
A) strongest/shortest
Questions with complete solution
2025
They type of compound that is most likely to contain a covalent bond is
_______________________.
A) one that is composed of a metal form the far left of the periodic table and a
nonmetal from the far right of the periodic table.
B) a solid metal
C) one that is composed of only nonmetals
D) held together by the electrostatic forces between oppositely charged ions.
E) there is no general rule to predict covalency in bonds. - correct answers C)
one that is composed of only non metals.
In which of the molecules below is the carbon-carbon distance the shortest?
A) H2C--CH2
B) H-C---C-H
C) H3C-CH3
D) H2C--C--CH2
E) H3C-CH2-CH3 - correct answers B) H-C---C-H
The Lewis Structure of N2H2 shows__________________.
A) a nitrogen-nitrogen triple bond
B) a nitrogen-nitrogen single bond
C) each nitrogen has one nonbonding electron pair
D) each nitrogen has two nonbonding electron pairs
,E) each hydrogen has one nonbonding electron pair - correct answers C)
each nitrogen has one nonbonding electron pair
The oxidation number of iron is Fe2O3 is ______________.
A) -2
B) +1
C) +3
D) +2
E) -3 - correct answers C) +3
The formal charge on sulfur is SO4-2 is _________, where the Lewis structure
of the iron is:
A) -2
B) 0
C) +2
D) +4
E) -4 - correct answers B) 0
The Lewis Structrue of CO3-2 iron is ________________. - correct answers
A valid Lewis Structure of _________ cannot be drawn without violating the
octet rule.
A) NF3
B) IF3
C) PF3
D) SbF3
E) SO4-2 - correct answers B) IF3
, The central atom in ________ does NOT violate the octet rule.
A) SF4
B) KrF2
C) CF4
D) XeF4
E) ICl4- - correct answers C) CF4
Given the average bond energies for C-H and C-Br bonds are 413 and 267
kJ/mol, respectively, the heat of atomization of bromoform (CHBr3) is
_________ kJ/mol.
A) 1241
B) 689
C) -689
D) 1378
E) -1378 - correct answers A) 1241
C-H=413
C-Br=276
*3
= 828
828 + 413 = 1241
Of the bonds C-C, C--C, C---C, the C-C bond is ___________.
A) strongest/shortest
