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1、1. Hydrogen is prepared by means of _D_ reaction in lab.(a) substitution (b) decomposition (c) addition (d) displacement2. Benzene reaction with Cl2 belongs to _A_a) substitution (b) decomposition (c) addition (d) displacement3. The _C_ elements from monoatomic molecules due to their filled valent e
2、lectronic configurations.(a) representative (b) transition element (c) inert gas (d) p-block4. Alkenes are produced in _B_ reaction as described below(a) addition (b) elimination (c) displacement (d) substitution5. The _C_ structure of CH4 has been verified by electron diffracxtion because of sp3 hy
3、bridization.(a) flat square (b) parellel tetragonal (c) tetrahedral (d) tetragonal6. The octet rile simoly states that an atom tends to gain or lose electrons until there are _B_ electrons in its valent shell(a) 12 (b) 8 (c) 6 (d) 127. When water combines with pure CuSO4, a _B_ CuSO4.5H2O forms(a) h
4、ydrogenate (b) hydrate (c) hydrocarbon (d) hydride8. Lyophobic colloid generally have _A_ identity between their molecules and solvent molecules.(a) attraction (b) electrostatic force (c) repulsion (d) electronegativity9. Which of the following has minimum ionization energy? D(a) Li (b) Na (c) K (d)
5、 Rb10. The seawater is saline solution. To desalinate seawater is the process to _D_ salt component(a) add (b) dilute (c) concentrate (d) remove11. There are(is) _A_ paired electrons in hydrogen(a) 1 (b) 2 (c) 3 (d)412. The valent electronic configuration for fluorine is _C_(a) 1s2 (b) 2s2 (c) 2s2.2
6、p5 (d) is2. 2s2, 2p513. The octet means that the number of electrons in _C_ shell has to be eight.(a) innermost (b) the whole (c) outermost (d) no14. Polysaccarides like cellulose and starch must first be subjected to _A_ to form simpler sugar, such as monosaccarides.(a) dehydration (b) composition
7、(c) hydrolysiis (d) comparsion15. Which of the following belongs to transition metal? D(a) S (b) Na (c) He (d) V16 Addition of AgNO3 in a solution generates white AgCl _C_ that does not dissolve in HNO3(a) solvent (b)silica-gel (c) precipitate (d) solvent1. The nature of organic species present depe
8、nds on the degree of biochemical change of the original plant, C(a) pattern (b) fractions (c) substances (d) ceramics2. I(py)2+ appears to be present in solution C(a) be made (b) be dissolved (c) be detected (d) occur3.The M-F-M bridge bonds invariably have greater M-F distances than corresponding t
9、erminal M-F bonds. C(a) seldom (b) strongly (c) usually (d) never4. The chemical potential decreases and both the effect, i.e., solubility and normal temperature effect. B(a) for example (b) that is to say (c) through (d) approximately5.The M-F-M bridge bonds invariably have greater M-F distances th
10、an corresponding terminal M-F bonds. A(a) end (b) head (c) initial (d) intermediate6. The corresponding bromine-and chlorine-species are less stable. B(a) compound (b) substances (c) supports (d) elementsH2O2, hydrogen peroxide Na2O2, sodium peroxide Se, selenium F , fluorine Br2, bromine PCl3, phos
11、phorus trichloride HI, hydrogen iodide AgI, silver iodide I2, iodine I-, iodide ICl3, iodine trichloride Br-, bromide NF3, nitrogen trifluoride ClF7, chlorine heptafluoride CCl4, carbon tetrachloride PF3, phosphorus trifluoride Cl2O7 dichlorine heptoxideHydration-combination with water molecules.1.
12、The _A_ ion can be considered s hydrated proton, H3O+.(a) hydrogen (b) hydroxyl (c) hydronium (d) hydroxo2. Chlorine is bubbled into aqueous sodium bromide, _A_ is liberated(a) bromine (b) dibromide (c) bromide (d) bromide ion3. Which of the following is diatomic molecule? D(a) He (b) Ne (c) Ar (d)
13、H24. Which of the following is oxoanion? C(a) S2-, (b) HS-, (c) SO42-, (d) H2S1. In addition, for first order model the intercept of the straight line plots of log(qe-qt) against t B(a) therefore (b) Furthermore (c) But (d) Actually2. Most fluorine compounds are obtained from fluorspar via HF B(a) i
14、n (b) through (c) of (d) containingSnCl4, tin(IV) chloride FeCl3, iron(III) chloride PbCl4, lead(IV) chloride Sn2+, tin(II) ion CaCl2, calcium chloride I3-, triiodide ion CdCl2, cadmium chloride S2-, sulfide ion HgCl2, mercury(II) chloride FeO, iron(II) oxide Cu2O, copper(I) oxide O2-, oxide ionAlCl3, aluminium chloride CBr4, carbon tetrabromide CdS, cadmium sulfide S22-, disulfide ion ZnO, zinc oxide V5+, vanadium(V) ion Cr3+,
