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轉學考-普通化學
> 104年 - 104 高雄醫學大學_學生轉系考試：普通化學#27052
104年 - 104 高雄醫學大學_學生轉系考試：普通化學#27052
科目：
轉學考-普通化學 |
年份：
104年 |
選擇題數：
25 |
申論題數：
0
試卷資訊
所屬科目：
轉學考-普通化學
選擇題 (25)
1. A sample containing 33.42 g of metal pellets is poured into a graduated cylinder initially containing 12.7 mL of water, causing the water level in the cylinder to rise to 21.6 mL. The density of the metal is mg/cm
3
. (A)3755(B)3760(C)3800 (D) 4000 (E)none of these
2. Which of the following pairs is incorrect? (A)NaNO
2
, sodium nitrite(B)K
2
Cr
2
O
7
, potassium chromate(C)Rb
2
O, rubidium oxide (D) NH
4
CH
3
COO, ammonium acetate (E)Mg(CN)
2
, magnesium cyanide
3. Which one of the following statements is incorrect? (A)Lead(IV) carbonate has its formulas of Pb(CO
3)
2.(B)The systematic name for NaH2PO4 is sodium dihydrogen phosphate. (C)A possible name for CuBr
2
is cuprous bromide. (D) The systematic name for AsF
5
is arsenic pentafluoride. (E)The systematic name for LiOCl is lithium hypochlorite.
4. Which of the following gases would you expect to have the smallest value of of the van der Waals constant b: H
2
, N
2
, CH
4
, C
2
H
6
, C
3
H
8
?. (A)H
2
(B)N
2
(C)CH
4
(D) C
2
H
6
(E)C
3
H
8
5. Which one of the following statements is incorrect? (A)At constant temperature, the lighter the gas molecules, the faster the average velocity of the gas molecules. (B) A real gas behave most ideally when the container volume is relatively large and the gas molecules are moving relatively quickly. (C) For a 1.0-L container of neon gas at STP, its average velocity will increase when the volume of the container is decreased to 0.5 L. (D) At constant V and T, when gas added into the container, the number of collision per unit area increases to result in a higher pressure. (E)For a 1.0-L container of neon gas at STP, its kinetic energy will increase when its temperature is increased to 100℃.
6. A 12.6-g sample of acetylene (C2H2) produced a temperature increase of 16.9℃ in a bomb calorimeter (heat capacity = 31.5 kJ/℃). The energy of combustion for acetylene is thus kJ/mol. (A)532(B)1100(C)-1100 (D) -532 (E)3830
7. A certain reaction has an activation energy of 54.0 kJ/mol. As the temperature is increased from 22℃to a higher temperature, the rate constant increases by a factor of 7.00. The indicated higher temperature is K. (A)335(B)289(C)324 (D) 340 (E)351
8. The decomposition of ethanol (C
2
H
5
OH) on an alumina (Al
2
O
3
) surface, C
2
H
5
OH(g) → C
2
H
4
(g) + H
2
O(g), was studied at 600 K. Concentration versus time data were collected for this reaction, and the plot of [A] versus time resulted in a straight line with a slope of -4.00 ×
mol/L*s. If the initial concentration of ethanol was 1.25 ×
M, the time required to decompose all ethanol was .(A)5.22 min(B)313 min(C)156 min(D) 31.3 min(E)0.26 min
9. For the reaction PCl
5
(g) PCl
3
(g) + Cl
2
(g) at 327℃, the equilibrium constant, Kp, is 11.5. Suppose that 2.450 g PCl
5
is placed in an evacuated 500-mL bulb, which is then heated to 327℃. The partial pressure of PCl
3
at equilibrium is atm. (A)0.1(B)2.22(C)1.06 (D) 0.38 (E)4.80
10. Which of the following 0.10 M solutions are correctly arranged in order of the strongest acidic to the weakest acid? (Ka of HNO
2
= 4.0 × 10
-4
; Kb of HONH
2
= 1.1 × 10
-8
) (A)HClO
4
> HNO
2
> CaBr
2
> KNO
2
> HONH
3
ClO
4
(B)HNO
2
> HClO
4
> CaBr
2
> HONH
3
ClO
4
> KNO
2
(C) HONH
3
ClO
4
> HClO
4
> HNO
2
> CaBr
2
> KNO
2
(D) HClO
4
> HNO
2
> HONH
3
ClO
4
> CaBr
2
> KNO
2
(E)KNO
2
> HClO
4
> HNO
2
> CaBr
2
> HONH
3
ClO
4
11. The pH of a 0.05 M solution of trichloroacetic acid (CCl
3
CO
2
H), a corrosive acid used to precipitate proteins, has the same pH as a 0.04 M HClO
4
solution. The Ka for trichloroacetic acid is thus . (A)4.0 × 10
-8
(B)1.6 × 10
-5
(C)0.16 (D) 1.4 × 10
-14
(E)0.001
12. Which of the following statements is correct? (A)Carbon has electron affinity more favorable (exothermic) than nitrogen(B)H has the radius smaller than He (C) For Te, S, and Se, the order of increasing atomic size is Se < S < Te (D) Among Nb, Zn, and Si, Zn has the smallest radius (E)Among Cl, In, and Se, In has the smallest radius
13. In the ground state of mercury, Hg, (A)its electron configuration is 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
(B)it has 16 electrons occupying atomic orbitals with n = 3(C)it has 30 electrons in d atomic orbitals (D) it has 10 electrons in px atomic orbitals (E)it has 31 electrons with ‘spin’ up (ms = 1/2)
14. LiI(s) has a heat of formation of -292 kJ/mol and a lattice energy of -753 kJ/mol. The ionization energy of Li(g) is 520 kJ/mol, the bond energy of I
2
(g) is 151 kJ/mol, and the electron affinity of I(g) is -295 kJ/mol. Use these data to determine the heat of sublimation of Li(s) to be . (A)411 kJ(B)-411 kJ(C)109 kJ (D) -109 kJ (E)161 kJ
15. Which of the following statements is correct? (A)In HF, its bonding molecular orbital has greater H 1s character than fluorine 2p character (B) The bond strength of C2
2-
is expected to strengthen as an electron is removed to form the positive charged ion (C) The bond strength of H2 is expected to increase as an electron is removed to form the positive charged ion (D) The order of increasing bond length is CO
2+
> CO
+
> CO (E)The bond order of CO
+
is 3
16. Which of the following statements is correct? (A)HBr has boiling point higher than Kr and Cl
2
(B)HF has freezing point higher than H
2
O and NaCl (C) Cl2 has vapor pressure lower than Br
2
and I
2
(D) CO has freezing point lower than N
2
and CO
2
(E)HBr has boiling point higher than HF and HCl
17. What is the osmotic pressure of an aqueous solution containing 1.0 g/L of a protein (molar mass = 9.0 × 10
4
g/mole) and its density of the solution being 1.0 g/cm
3
at 25℃? (R = 0.08206 L*atm*mol
-1
*K
-1
) (A)0.200 torr(B)0.030 torr(C)0.003 torr (D) 0.400 torr (E)0.0003 torr
18. You have 75.0 mL of 0.10 M HA. After adding 30.0 mL of 0.10 M NaOH, the pH of the HA-NaOH solution is 5.50. What is the Ka value of HA? (A)1.74 × 10
-8
(B)2.1 × 10
-6
(C)6.0 × 10
-5
(D) 5.6 × 10
-4
(E)6.6 × 10
-7
19. Kf for the complex ion Ag(NH3)2 + is 1.7 × 107 . Ksp for AgCl is 1.6 × 10-10. Calculate the molar solubility of AgCl (in mol/L) in 1.0 M NH3. (A)1.5 × 10
-4
(B)1.5 × 10
-3-
(C)1.5 × 10
-2
(D) 4.7 × 10
-2
(E)4.7 × 10
-3
20. What is the
for H
2
O(g) + (1/2)O
2
(g) ←→ H
2
O
2
(g) at 600. K using the following data: H
2
(g) + O
2
(g) ←→ H
2
O
2
(g) K = 2.3 × 10
6
at 600. K 2H
2
(g) + O
2
(g) ←→ 2H
2
O(g) K = 1.8 × 10
37
at 600. K? (A)-7.1 × 10
4
J/mol(B)1.4 × 10
5
J/mol(C)1.1 × 10
5
J/mol (D) 7.9 × 10
3
J/mol (E)1.0 × 10
3
J/mol
21. Which of the following statements is correct? (A)For 2H
2
(g) + O
2
(g) → 2H
2
O(l), its
is larger than 0 (> 0)(B)The S
o
of C
2
H
5
OH(l) is larger than the S
o
of C
2
H
5
OH(g) (C)One mol N
2
(at STP) has more positional probability than 1 mol N
2
at 100 K, 2.0 atm. (D) The sign of
for the process of H
2
O(l) → H
2
O(g) is
positive
(+). (E)At constant T and P, the change with
is not a spontaneous process.
22. An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode. What is the potential of the cell at 25℃ if the copper electrode is placed in a solution in which [Cu
2+
] = 2.5 × 10
-4
M. [Note: Cu
2+
(aq) + 2e
-
→ Cu(s), E
0
= 0.34 V] (A)0.23 V(B)-0.16 V(C)0.018 V (D) 0.26 V (E)0.059 V
23. Which of the following compound is not going to dissolve in carbon tetrachloride? (A)CO
2
(B)CH
2
=CH
2
(C)NH
4
NO
3
(D) KrF
2
(E)C
6
H
14
(Hexane)
24. Phosphorus-32 (P-32) is a commonly used radioactive nuclide in biochemical research, particularly in studies of nucleic acids. The half-life of P-32 is 14.3 days. What mass of P-32 is left from an original sample of 175 mg of Na
3
32
PO
4
after 35.0 days? Assume the atomic mass of 32-P is 32.0. (A)6.22 mg(B)62.20 mg(C)0.12 mg (D) 1.24 mg (E)12.44 mg
25. Which of the following statements is correct? (A)The low-spin Ru(NH
3
)
6
2+
ion has 4 unpaired electrons.(B)The Ni(H
2
O)
6
2+
ion has 0 unpaired electrons. (C)The diamagnetic PdCl
4
2-
ion has a tetrahedral d
8
structure. (D) CN
-
is a weaker field ligand than SCN
-1
because the Fe(CN)
6
3-
ion is paramagnetic with one unpaired electron and the Fe(SCN)
6
3-
ion has five unpaired electrons. (E)The F- ligand in the CrF
6
4-
ion produces a weak field because the ion is known to have four unpaired electrons.
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mol/L*s. If the initial concentration of ethanol was 1.25 × 
M, the time required to decompose all ethanol was .(A)5.22 min(B)313 min(C)156 min(D) 31.3 min(E)0.26 min
for H2O(g) + (1/2)O2(g) ←→ H2O2(g) at 600. K using the following data:
H2(g) + O2(g) ←→ H2O2(g) K = 2.3 × 106
at 600. K
2H2(g) + O2(g) ←→ 2H2O(g) K = 1.8 × 1037 at 600. K?
(A)-7.1 × 104
J/mol(B)1.4 × 105 J/mol(C)1.1 × 105
J/mol (D) 7.9 × 103
J/mol (E)1.0 × 103
J/mol
is larger than 0 (> 0)(B)The So
of C2H5OH(l) is larger than the So
of C2H5OH(g)
(C)One mol N2 (at STP) has more positional probability than 1 mol N2 at 100 K, 2.0 atm.
(D) The sign of 
for the process of H2O(l) → H2O(g) is positive (+).
(E)At constant T and P, the change with 
is not a spontaneous process.