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2011无机化学原理(英语)A试卷郑州大学

Term-end Examination of Inorganic Chemistry (A) (The first semester of the academic year of 2011-2012)

Reviewer 1： Reviewer 21. Multiple-Choice Questions (30 marks)

(1) Which is an (are) element(s)? (i) CO, (ii) Co, (iii) C, (iv) Cl 22(a) only iii (b) iii and iv (c) i and v (d) ii, iii and iv (e) ii and iii

(2) Which is a molecular compound?

(a) KI (b) Fe(NO 3)2 (c) H 2S (d) Na 2S (e) O 2

(3) Which is the symbol for the SI base unit of mass

(a) m; (b) g; (c) kg; (d) gr; (e) mol

(4) Which term can correctly be applied to the reaction Zn(s) + 2HCl(aq) → ZnCl 2(aq) +

H 2(g)?

(a) double replacement (b) neutralization (c) decomposition (d) combination (e) single replacement

(5) Electricity is carried through a solution of an electrolyte by

(a) electrons only (b) anions only (c) cations only (d) both cations and anions (e)both electrons and ions.

(6) At the same temperature and pressure, molecules of which of the following have the highest

average speed?

(a) Br 2(g) (b) Cl 2(g) (c) F 2(g) (d) I 2(g)

(7) Which of the four gases behaves ideally?

(a) 1 (b) 2 (c) 3 (d) 4

(8) Light is given off by a sodium vapor streetlight when

(a) electrons move from a given energy level to a higher energy level

(b) electrons are removed from atoms and cations are formed.

(d) electrons are added to atoms and anions are formed

(e) atoms combine to form molecules

(9) The electrons in which subshell experience the largest effective nuclear charge in a

multielectron?

(a) 4s (b) 4p (c) 4d (d) 4f (e) All of the preceding experience the same effective

nuclear charge in a multielectron atom.

(10) Which element has the higest electron affinity ?

(a) Ar (b) Br (c) Cl (d) S (e) Se

(11) Arrange in order of decreasing radii: K Mg Mg2+ Na

(a) Mg2+ > Mg > Na > K (b) K > Na > Mg2+ > Mg

(c ) K > Mg > Na > Mg2+(d) K > Na > Mg > Mg2+

(12) Given the electronegativityes, C = 2.5, N = 3.1, S = 2.4, which Lewis structure is best for

the thiocyanate ion?

(13) How many unshared pairs of valence electrons are in the Lewis structure for AsCl3?

(a) 1 (b) 3 (c) 10 (d) 13 (e) 26

(14) In a molecule of XeF4, the arrangement of electron pairs would be described as

(a) octahedral (b) square planar (c) square pyramidal (d) tetrahedral

(e) trigonal bipyramidal

(15) Which phase diagram corresponds to a substance that will sublime rather than melt as it is

heated at 1 atm?

(16) Which mixture is most likely to be an ideal solution?

(a) CH3CH2OH and CH3(CH2)3CH3

(b) CH3(CH2)3CH3 and CH3(CH2)4CH3

(d) NaOH and H2O

(e) CH3(CH2)3CH3 and H2O

(17) Arrange the bases ClCH2COO-, CH3COO- and FCH2COO- in order of increasing strength

(a) ClCH2COO- < FCH2COO- < CH3COO-

(b) CH3COO- < ClCH2COO- < FCH2COO-

(d) CH3COO- < FCH2COO- < ClCH2COO-

(e) FCH2COO- < CH3COO- < ClCH2COO-

(18) Which can not act as a Lewis acid?

(a) O2-(b) Al(OH)3(c) CO2(d) Fe3+(e) BBr3

(19) If CaCl2 (aq) is electrolyzed using inert electrodes,

(a) H2(g) is produced at the cathode and Cl2(g) at the anode.

(b) Cl2(g) is produced at the cathode and H2(g) at the anode

(d) Ca(s) is produced at the cathode and Cl2(g) at the anode.

(e) Cl2(g) is produced at the cathode and Ca(s) at the anode

(20) Which lists only the species that have zero bond order?

Li2, Ne2, C2+, He2, F22-

(a) Ne2, He2, F22-(b) C2+, (c) Ne2, He2 (d) Li2, C2+ (e) Li2, He2

(21) Which lists only the molecules given below that are paramagnetic?

B2, C2, N2, O2, F2

(a) B2, N2(b) B2, O2(c) N2, O2(d) N2, F2(e) C2, O2, F2

(22) NF3 is best described by assuming what kind of hybridization at the central atom?

(a) sp (b) sp2(c) sp3(d) sp3d (e) sp3d2

(23) The units of the rate constant for a second order reaction could be

(a) M-1·s-1(b) M (c) M·s-1 (d) s-1 (e) M2·s-1

(24) Which graph depicts how the free energy of the system (G sys) changes for the formation of

HI?

(25) A gaseous reaction takes place at constant volume and constant pressure in a cylinder shown

here. Which of the following equations best describes the reaction? The initial temperature (T1) is twice that of the final temperature (T2).

(a) A + B →C

(b)AB →C + D

(d) A + B →2C + D

(26)The first law of thermodynamics, ΔU = Q + W, can only be applied to

(a) phase transition (b) physical change (c) chemical change

(d) any change in a closed system

(27) What type of lattice does CsCl belong to?

(a) simple cubic (b) face-centered cubic (c) body-centered cubic

(d) hexagonal closed packing

(28)In which of the following solutions, the solubility of CaCO3 is largest?

(a) pure water (b) 0.1 M NaHCO3(c) 0.1 M Na2CO3(d) 0.1 M CaCl2(e) 0.5 M

KNO3

(29)Which of the following sets of quantum numbers could represent the “last” electron added

to complete the electron configuration for a ground state atom of Br according to the Aufbau Principle.

n l m l m s

(a) 4 0 0 -1/2

(b) 4 1 1 -1/2

(d) 4 1 2 +1/2

(e) 4 2 1 -1/2

(30) Which gas would be expected to behave most ideally?

(a) F2(b) Ne (c) PCl3(d) NH3(e) N2

2. Name the compounds according to the formulas given (10 marks)

(1)KCl

(2)Na2SO4·10H2O

(3)KH2PO4

(4)N2O5

(5)H3PO3

(6)H3O+

(7) HCl (aq)

(8) Cu(ClO4)·6H2O

(9)Sn

(10) Au

3. Write out the English names of the following terms and symbols

(10 marks)

(1)有效数字

(2)质量摩尔浓度

(3)真实气体

(4)中和反应

(5)二元弱酸

(6)分子轨道

(7)原子晶体

(8)价层电子对互斥理论(VSEPR)

(9)K w

(10)△f G o

orbitals (+ and –signs and the x, y, z axes should be

appropriately.) (15 marks)

(1)3d xz

(2)3d z2

(3)one set of sp hybrid orbitals

(4) σ anti-bonding molecular orbital formed by two 2p x atomic orbital

(5) π antibonding molecular orbital formed by two 2p y atomic orbitals. 5. (10 marks)

(1) Construct the molecular orbital energy level diagram for the hypothetical molecule -- Xe 2.

(consider the s, p atomic orbitals only) (2) Predict if Xe 2+ can exsist.

(3) Calculate the bond orders for Xe 2, Xe 2+.

6. (15 marks)

(1) The standard reduction potential for Hg 22+/Hg at 298K (

E /22

) is 0.797 V. What is the

H g Cl H g E /22? ()(22Cl Hg K sp

= 1.43 ×

10-18) (2) SCE (saturated calomel electrode) is based on the redox electric couple of Hg 2Cl 2/Hg in the

saturated solution of KCl. Calculate the reduction potential of SCE at 25 °C. The solubility of KCl at 25 °C is 35.5 g/ 100 g H 2O with the density being 1.988 g/cm 3.

(3) If a V oltaic cell is made by comparison of the standard hydrogen electrode with SHE. Write the cell diagram of it.

7. (10 marks)

The hydrogen ion concentration ([H +]) of an aqueous solution of a monoprotic weak acid (HA) is a mol/L. The hydrogen ion concentration ([H +]) of an aqueous solution of the sodium salt of this monoprotic weak acid (NaA) is b mol/L. Mixing of the solution of HA with the same volume of the solution of NaA affords a solution with [H +] being c mol/L? Please deduce the expression of K a for this weak acid.

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