CHEM 230 (ALTAMIRANO) FINAL EXAM
Give the ground state electron configuration for I - Answer -[Kr]5s^2, 4d^10, 5p^5
Which of the following is a strong acid?
A. CH3NH2
B. CH3O-
C. H2N-
D. CH3OH
E. CH3NH3+ - Answer -E. CH3NH3+
A molecule of acetonitrile CH3Ch2Ch contains ____ sigma bonds and ____ pi bonds -
Answer -8 sigma
2 pi
Which acid forms a weaker conjugate base?
A. H3COOH
B. H3CNH3 - Answer -A. H3COOH
Which molecule listed below is a polar molecule?
A. NH3
B. H2O
C. HCN - Answer -A. NH3
B. H2O
C. HCN
Which of the following pairs of bases lists the stronger base first?
A. I- > Cl-
B. CH3Coo- > HO-
C. H2N- > CH3COO-
D. H2N- > CH3COO-
E. H2) > HO- - Answer -D. H2N- > CH3COO-
Identify the compound with the highest pKa.
A. CH3NH2
B. CH2OH
C. H2O
D. CH3NH3+
E. CH3COOH - Answer -A. CH3NH2
How many tertiary carbons are present in 2,4-dimethylhexane?
A. 6
B. 2
C. 0
D. 8
, E. 1 - Answer -B. 2
When methanol (CH3OH) acts as an acid, its conjugate base is...?
A. CH4OH
B. CH4O+
C. CH3OH2+
D. CH3O-
E. -CH2OH - Answer -D. CH3O-
What orbitals overlap to create the C-H bone in ethyne (HC=-CH)
A. s-sp
B. s-sp3
C. s-p
D. p-p
E. s-sp2 - Answer -A. s-sp
Draw the lewis structure for H3O+. what is the hybridization on the O atom?
A. sp3d2
B. sp3
C. sp3d
D. sp
E. sp2 - Answer -B. sp3
Identify the most acidic carboxylic acid
A. FCH2COOH
B. ICH2COOH
C. BrCH2COOH
D. ClCH2COOH
E. CH3COOH - Answer -A. FCH2COOH
What is the predicted shape, bone angle, and hybridization for +CH3?
A. trigonal pyramidal, 120, sp2
B. trigonal pyramidal, 109.5, sp2
C. tribal planar, 120, sp2
D. trigonal planar, 120, sp3
E. tribal planar, 109.5, sp2 - Answer -C. tribal planar, 120, sp2
Which molecule below is an ether?
A. CH3CH2OCH2CH3
B. (CH3)2C=CH2
C. (CH3)2CHCH2NH2
D. (CH3)2CHCH2OH
E. CH3CH2CH2CO2H - Answer -A. CH3CH2OCH2CH3
What is the bond angle between electron groups in the following Lewis structure
O-N=O
Give the ground state electron configuration for I - Answer -[Kr]5s^2, 4d^10, 5p^5
Which of the following is a strong acid?
A. CH3NH2
B. CH3O-
C. H2N-
D. CH3OH
E. CH3NH3+ - Answer -E. CH3NH3+
A molecule of acetonitrile CH3Ch2Ch contains ____ sigma bonds and ____ pi bonds -
Answer -8 sigma
2 pi
Which acid forms a weaker conjugate base?
A. H3COOH
B. H3CNH3 - Answer -A. H3COOH
Which molecule listed below is a polar molecule?
A. NH3
B. H2O
C. HCN - Answer -A. NH3
B. H2O
C. HCN
Which of the following pairs of bases lists the stronger base first?
A. I- > Cl-
B. CH3Coo- > HO-
C. H2N- > CH3COO-
D. H2N- > CH3COO-
E. H2) > HO- - Answer -D. H2N- > CH3COO-
Identify the compound with the highest pKa.
A. CH3NH2
B. CH2OH
C. H2O
D. CH3NH3+
E. CH3COOH - Answer -A. CH3NH2
How many tertiary carbons are present in 2,4-dimethylhexane?
A. 6
B. 2
C. 0
D. 8
, E. 1 - Answer -B. 2
When methanol (CH3OH) acts as an acid, its conjugate base is...?
A. CH4OH
B. CH4O+
C. CH3OH2+
D. CH3O-
E. -CH2OH - Answer -D. CH3O-
What orbitals overlap to create the C-H bone in ethyne (HC=-CH)
A. s-sp
B. s-sp3
C. s-p
D. p-p
E. s-sp2 - Answer -A. s-sp
Draw the lewis structure for H3O+. what is the hybridization on the O atom?
A. sp3d2
B. sp3
C. sp3d
D. sp
E. sp2 - Answer -B. sp3
Identify the most acidic carboxylic acid
A. FCH2COOH
B. ICH2COOH
C. BrCH2COOH
D. ClCH2COOH
E. CH3COOH - Answer -A. FCH2COOH
What is the predicted shape, bone angle, and hybridization for +CH3?
A. trigonal pyramidal, 120, sp2
B. trigonal pyramidal, 109.5, sp2
C. tribal planar, 120, sp2
D. trigonal planar, 120, sp3
E. tribal planar, 109.5, sp2 - Answer -C. tribal planar, 120, sp2
Which molecule below is an ether?
A. CH3CH2OCH2CH3
B. (CH3)2C=CH2
C. (CH3)2CHCH2NH2
D. (CH3)2CHCH2OH
E. CH3CH2CH2CO2H - Answer -A. CH3CH2OCH2CH3
What is the bond angle between electron groups in the following Lewis structure
O-N=O
