[試題] 98下 佘瑞琳 普通化學甲下 期末考
課程名稱︰普通化學甲下
課程性質︰系所必修
課程教師︰佘瑞琳
開課學院：化工系
開課系所︰化工系
考試日期（年月日）︰2010.06.23
考試時限（分鐘）：100分鐘
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試題 :
I.Multiple Choice Qusetions: (30%)
1.Which of the following statements concerning with the hydrogen fuel is
correct?
(a) The reaction of anode is: 2H+(aq) + 2e- → H2(g)
(b) It needs catalyst, such as Pt, to catalyze the reaction.
(c) The product of the reaction is H2(g).
(d) The conversion of chemical energy to electricity is more efficient.
2.Which of the following statements concerning with the rusting of iron (Fe)
is correct?
(a) The rusting of iron requires both oxygen and water.
(b) The rusting of iron is a redox reaction.
(c) The presence of salts will enhance the corrosion of iron.
(d) Zinc can act as a sacrificial cathode to protect from rusting.
3.For a voltaic cell: Fe(s)｜Fe2+∥Ag+｜Ag(s)
(a) Iron is the oxidizing agent.
(b) Iron is the positive electrode.
(c) Electrons flow from Fe(s) to Ag(s).
(d) The E0 at 298K is 2.04V.
4.A voltaic cell utilizes the following reaction:
Zn(s) + 2H+(aq) → H2(g) +Zn2+(aq), which of the following is true?
(a)If the size of the zinc electrode is incresed, the cell emf will be
increased.
(b)The pressure of the H2(g) is increased in the cathode compartment, the
cell emf will be increased.
(c)If Zn(NO3)2(s) is added to the anode compartment to increase the [Zn2+],
the cell emf will be increased.
(d)At 25。C, the standard free energy change, ΔG0, of the reaction is less
than 0.
5.Give the missing particle in the nuclear reaction: 131 131
53 I → ? + 54 Xe
(a) 0
-1 e
(b) 0
1 e
(c) 1
0 n
(d) 4
2 He
6.Which of the following nuclide is radioactive?
(a) 11
6 C
(b)231
91 Pa
(c) 60
27 Co
(d) 40
20 Ca
7.In the complex ion: [Co(en)2Cl2]+,
(a)The oxidation number of Co is +1.
(b)The coordination number of Co is 4.
(c)The geometry of the complex ion is square planar.
(d)The name of the complex ion is:
dichlorobis(ethylenediamine)cobalt(III) ion.
8.Which of the following shows correct systematic name along with formula?
(a)[Cr(NH3)6]NO3, hexaaminechromium(III) nitrate.
(b)Na2[MoOCl4], sodium tetrachlorooxomolybdate(IV)
(c)K4[Ni(CN)4], potassium tetracyanonickelate(II)
(d)K[V(H2O)2Br4], potassium diaquatetrabromovanadate(III)
9.Whcih of the following complex shows geometric isomers?
(a)[Zn(en)2](ClO4)2
(b)[Pt(NH3)(ONO)2] (square planar)
(c)[V(en)2Cl2]+
(d)[Co(NH3)5SCN]2+
10.The structure of L-ascorbic acid is as following
HO
﹨
HO C H O
＼ ／ ＼|╱ ╲
C C C＝O
﹨ ∕
C＝ C
∕ ﹨
HO OH
(a)There is one chiral carbon in the molecule.
(b)The molecule rotates the plane of the polarized light to the left.
(c)The molecules show H-bonding wirh water molecules.
(d)The molecule is water soluble.
11.Which of the following molecules will undergo addition reaction?
(a)benzene
(b)CH2＝CHCl
(c)HC≡CCH3
(d)CH3CH2CH3
12.Which of the following has correct systematic name?
(a) CH3
|
CH3CH2CCH3
|
CH2CH3 2-ethyl-2-methylbutane
(b) CH2CH3
|
CH3—C—C≡C—H
|
H 3-methyl-1-pentyne
(c) HO H
| |
H—C—C—H
| |
HO H 1,1-ethanediol
(d) H
|
CH3CH2—C—CHO
|
CH3 2-methylbutanal
13.Which of the following is quaternary amine?
(a)CH3(CH2)3NH2
(b)(CH3)3N
(c)
NH2
╱
┌─┐
│ │
└─┘
(d)(CH3)4N+
14.Concern with the molecule COO-
(a)It's a zwitterion. |
(b)It's a chiral molecule. H3N+—C—H
(c)It's an L-amino acid. |
(d)The molecule has a hydrophobic side group. CH3
15.If you synthesize an aspirin in the labwork, it show the structure as
O OH
\\／
C O
| ／ ＼／
benzene ∥
O
(a)It has a carboxyl group.
(b)It has an ester linkage.
(c)It is synthesized from an acid and an amine.
(d)It shows H-bonding with water molecules.
16.About the natural polymers, which of the following statement is true?
(a)The monomer of cellulose is galactose.
(b)The starch is the condensation polymer of glucose.
(c)Nucleotides are the monomers of DNA.
(d)α-Helix is the primary structure of protein.
17.Which of the following maybe one of the components of nucleotides?
(a)phosphoric acid
(b)deoxyribose
(c)adenine
(d)glucose
II.Problems: (70%)
1.(a)Balance the following redox reaction:
Cr2O72-(aq) + I-(aq) → Cr3+(aq) +I2(s) in acidic solution.
(b)Calculate the standard cell potential, E0, at 298K.
(c)Determine the equilibrium constant of the reaction.
(d)What is the cell potential when [Cr2O72-]=2.0M, [H+]=1.0M, [I-]=1.0M,
and [Ce3+]=1.0x10^(-5)M. (10%,p.866)
2.The cloth shroud from around a mummy is found to have C-14 activity of 9.7
disintegrations per minute per gram of carbon as compared with living
organisms that undergo 16.3 disintegrations per minute per gram of carbon.
From the half-life for C-14 decay, 5715 yr,
(a)calcuate the decay organisms that undergo 16.3 calculate the decay
constant, k, of the C-14
(b)calculate the age of the shroud. (4%,21.39)
3.A laboratory rat is exposed to an alpha-radiation source whose activity is
14.3 mCi.
(a)What is the activity of the radiation in bequerels (disintegrations/s)?
(b)The rat has a mass of 385g and is exposed to the radiation for 14.0s,
absorbing 35% if the emitted alpha particles, each having an energy of
9.12x10^(-13)J. Calculate the absorbed dose in millirads.
(c)If the RBE of the radiation is 9.5, calculate the effective absorbed
dose in mrem.
1 Ci= 3.7x10^(10) disintegrations/s (10%,24.48)
4.The ion [Fe(CN)6]3- has one unpaired electrons.
(a)Write the electron configurations of the central metal iom.
(b)Draw the crystal-field energy-level diagrams, and show the placement of
electrons for the complex.
(c)Is the complex diamagnetic or paramagnetic?
(d)Is the ion a high-spin or a low-spin complex?
5.Solutions of [Co(NH3)6]2+, [Co(H2O)6]2+, and [CoCl4]2- (tetrahedral) are
colored. One is pink, one is blus, and one is yellow. Based on the
spectrochemical series (Cl- < H2O < NH3), draw the crystal-field
energy-level diagrams and assign a color to each complex. (10%,24.62)
6.The ibuprofen is a medicine that can relieve pain and reduce inflammation.
According to the structure,
COOH
|
CH3 C—H
| ／|
CH benzene CH3
／ ＼ ／
CH3 CH2
(a)label the chiral carbons(s);
(b)indicate the functional groups;
(c)show the molecule is (R) or (S) ibuprofen? (6%,p.1079)
7.(a)What is an amino acid?
(b)How do amino acids react to form proteins?
(c)Draw the bond that links amino acids toghter in proteins.
(d)What is this called? (8%,25.55)
8.For the monosaccharide shown below,
CH2OH
|
C＝O
|
HO—C—H
|
H—C—OH
|
H—C—OH
|
CH2OH
(a)How many chiral carbons are present in the molecule?
(b)Is this D-sugar or L-sugar?
(c)Is this a pentose or hexose?
(d)Is this an aldose or ketose? (8%)
9.Draw the boat and chair conformations of cyclohexane. (4%)
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