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107年 - 107 臺灣綜合大學系統_學士班轉學生聯合招生試題：普通化學B#122176

科目：轉學考-普通化學 | 年份：107年 | 選擇題數：31 | 申論題數：0

試卷資訊

所屬科目：轉學考-普通化學

選擇題 (31)

1. Consider a certain gas at Kelvin temperatures T1and T2, where T2 = 2T1. Calculate the ratio for the mean fee path at  T1 relative to that at T2.(A)0.5(B)2.0 (C) 1.0 (D) 1.4 (E) 0.7
2. HF is a stronger acid than HC2H3O2. Order the following according to base strength. (A) C2H3O2-> F- >Cl->H2O (B) C2H3O2->F-> H₂O ＞ Cl-  (C) CI-> F->C2H3O2-> H2O (D) F->C2H3O2-> H2O>Cl- (E) none of these
3. What's the [H+] (in 10-7 M) in 1.0 x 10-4 M HCN? (A) 2.5 (B) 2.7 (C) 3.0 (D) 4.2 (E) 5.1
4. Consider five identical flasks filled with 1.0 mole different gases at 0 °C.
Flask A: CO at 250 torr, Flask B: N2 at 600 torr, Flask C: H2 at 400 torr,
Flask D: O2 at 800 torr, Flask E: CH4 at 600 torr,
In which flask will the molecules have the highest density? (A) A (B) B (C) C (D) D (E) E
5. A certain metal fluoride crystallizes in such a way that the fluoride ions occupy simple cubic lattice sites, while the metal atoms occupy the body centers of half the cubes. What is the formula for the metal fluoride? (A) MF2 (B) M2F (C) MF3 (D) M3F (E) none of these
6. Which of the metal ions in the following complex has a d³ electron configuration? (A) [Ti(H2O)6]2+ (B) [Ni(NH3)6]3+ (C) [Cr(CN)6]3-  (D) [Fe(CN)6]³-  (E) [FeCl6]4-
7. How many of the following molecules or ions (NF3, NO3-, BrF3, I3-, PC13, ICl3) have trigonal pyramid structures? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4
8. How many of the molecules or ions in Problem 7 have a hybridization of dsp³ on the central atom? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4
9. Consider the titration of 100.0 mL of a 0.05 M solution of the hypothetical weak acid H3X (Ka1=1.0x10-3, Ka2=1.0x10-7, Ka3=1.0x10-12) with 0.100 М КОН. Calculate the pH of the solution after adding 25.0 mL KOH. (A) 2.2 (B) 2.8 (C) 3.0 (D) 3.9 (E) 4.5
10. Calculate the pH of the solution in Problem 9 after adding 50.0 mL (total) KOH. (A) 4.5 (B) 6.0 (C) 5.5 (D) 5.0 (E) 6.5
11. Calculate the bond energy of F2- (in kJ/mol) by using the following data: ionization energy ofF2-(290 kJ/mol), ionization energy of F-(327.8 kJ/mol), and bond energy of F2 (154 kJ/mol). (A) 77 (B) 86 (C) 98 (D) 107 (E) 116
12. Arrange the following species in order of the shortest to the longest N-O bond:
(1)H2NOH, (2)N2O, (3)NO⁺, (4)NO2-, (5)NO3-.(A) 3, 2, 4, 5, 1 (B) 4, 2, 3, 5, 1 (C) 2, 3, 4, 1, 5 (D) 1, 5, 4, 2, 3 (E) 2, 3, 4, 5, 1
13. A certain substance, X, has a triple-point temperature of 20°C at a pressure of 2.0 atm. Which one of the following statements cannot possibly be true? (A) X can exist as a liquid above 20°C. (B) X can exist as a solid above 20°C. (C) Liquid X can exist as a stable phase at 25°C, 1 atm. (D) Both liquid and solid X have the same vapor pressure at 20°C. (E) All of these statements could be true.
14. The temperature at some planet is so high that the electronic ground state of the hydrogen atom is at n = 4. What's the ionization energy of the hydrogen atom at that planet if that in the Earth is equal to E? (A) E/4 (B) 4E (C) E/16 (D) 15E/16 (E) 16E
15. Arrange the elements C, N, and O in order of increasing ionization energy. (A) C, N, O (B) O, N, C (C) C, O, N (D) N, O, C (E) none of these
16. 1.0 mole monatomic ideal gas at 300 K and 10.0 atm is expanded adiabatically and reversibly to 1.0 atm. Calculate the final volume (in L). (A) 5.2 (B) 13.5 (C) 7.6 (D) 9.8 (E) 11.2
17. What's the work (in R) in Problem 16? (A) -210 (B) -270 (C) -360 (D) -320 (E) -440
18. A certain reaction has the following general form: a A → bB.
At a particular temperature and [A]o= 2.50 x 10-3 M, a plot of 1/[A] vs. time resulted in a straight line with a slope of 4.0 x 10-2 L/mol,s. What's the "third" half-life (in 104 s)? (A) 5.0 (B) 1.0 (C) 2.0 (D) 6.0 (E) 4.0
19. The reaction 2 NO(g) + O2(g) → 2 NO2(g) is believed to take place by
the following mechanism:
(1) NO + NO⇌ N2O2  (rate constant: kı and k-1, fast)
(2) O2 + N2O2 → 2 NO2 (rate constant k2, slow)
What's d[NO2]/dt under the condition k-1 ＞＞ k2[O2]? (A) k-1k2[NO]2[O2]/k1 (B) k-1k2[NO][O2]/k1 (C) 2k1k2[NO]²[O2]/k-1 (D) k-1k2[NO]²/kı (E) k1k2[NO]²[O2]/k-1
20. Consider the reaction 3A+B+CD + E, where the rate law is defined as
-d[A]dt =(1.66x102 L³/mol³ s)[A]²[B][C]
An experiment is carried out where [B]0 =2.0 M, [C]0 = 1.0 M and [A]0 = 2.5 x10-4 М. What's the concentration (in 10-5 M) of A after 5.0 minutes? (A) 7.2 (B) 8.7 (C) 6.5 (D) 4.2 (E) 1.3
21. How many unpaired electrons are found in [CoCl6]3- (weak field)? (A) 0 (B) 1 (C) 2 (D) 4 (E) 5
22. What is the correct systematic name for the molecule 2-ethyl-4-tertiary-butylpentane? (A) 2-t-butyl-5-methylhexane (B) 2-ethyl-4,5,5-trimethylhexane (C) 3,5,6,6-tetramethylheptane (D) 2,2,3,5-tetramethylheptane (E) none of these
23. Which of the following types of compounds lacks a sp²-hybridized carbon center? (A) aldehydes (B) ketones (C) alcohols (D) alkenes (E) toluene
24. How many isomers of an alcohol (formula C4H10O) can be oxidized to acid? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5
1. Given that Ag+(aq) + 2NH3(aq)⇌  Ag(NH3)2+(aq)  (Keq=1.6 x107) calculate [Cl-]cq (in M) when the solid AgCl (Ksp=1.0x10-10) is put in a 10.0 M NH3 solution. (A) 0.42 (B) 0.37 (C) 0.47 (D) 0.68 (E) 0.56
2. Given that pure liquid A has vapor pressure x, and pure liquid B has vapor pressure y, with x ＞ y, calculate the mole fraction of A in the ideal A/B solution if the vapor above the solution is 20% A? (A) y/(4x + y) (B) 4y/(x+4y) (C) x/(x+4y) (D) 4x/(4x+y) (E) 2y/(x + 2y)

3. Consider the galvanic cell based on the following half-reactions:
Zn+2+2 e-→ Zn, E°= -0.76 V； Fe+2+2e→ Fe, E°=-0.44 V.
What's E°cell (in V) at 25 °C if [Zn+2] = 0.10 M and [Fe+2] = 1.0x10-5 M? (A) 0.32 (B) 0.28 (C) 0.26 (D) 0.23 (E) 0.20
4. Consider the following equilibrium: N2(g) + 3H2(g)⇌2NH3(g)
with Keq = 2.0x10-6. Assuming that 1.00 mol each of all reactants and products is placed initially in a 1.00-L container, what's the equilibrium concentration (in M) of N2? (A) 0.5 (B) 1.0 (C) 1.5 (D) 2.0 (E) 2.5
5. What's the equilibrium concentration (in 10-3 M) of NH3 in Problem 4? (A) 5.2 (B) 3.3 (C) 8.7 (D) 2.1 (E) 6.8

6. Calculate the △Ssys (in R) for 1.0 mole of monatomic (單原子) ideal gas changing
from state A (1.0 atm, 300 K) to state B (2.0 atm, 600 K). (A) 1.7 (B) 1.0 (C) 2.5 (D) 3.2 (E) 2.1

7. Calculate △G (in kJ) at 300 K for the reaction CO(g) + 2 H2(g) → CH3OH(l)
，in which pco = 2.23 atm, pH2 = 3.0 atm, △Gf°(CO)= -137 kJ/mol, and△Gf° (CH3OH)= -166 kJ/mol. (A) -36.5 (B) -42.2 (C) -33.4 (D) -38.1 (E) -45.6

申論題 (0)