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Question 1 · Single choice · 中档
A. 二氧化硫 B. 氟氯代烃 C. 二氧化碳 D. 甲烷
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Question 2 · Single choice · 中档
常温下,将0.1 mol·L -1氢氧化钠溶液与0.06 mol·L - 1硫酸溶液等体积混合,该混合溶液的pH等于
A. 1.7 B. 2.0 C. 12.0 D. 12.4
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Question 3 · Single choice · 中档
对于化学反应$3W(g)+2X(g)=4Y(g)+3Z(g)$,下列反应速率关系中,正确的是
A. υ($W)=3$υ(Z) B. 2υ($X)=3$υ(Z) C. 2υ($X)=v(Y)$ D. 3υ($W)=2$υ(X)
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Question 4 · Single choice · 中档
把V L含有MgS0 4和K2S04的混合溶液分成两等份,一份加入含a mol NaOH的溶液,恰好使镁离子完全沉淀为氢氧化镁;另一份加入含b mol BaCl2的溶液,恰好使硫酸根离子完全沉淀为硫酸钡。则原混合溶液中钾离子的浓度为
A. b - a
V
mol·L-1 B. 2b - a
V
mol·L-1
第- 2 -页 | 共29页 C. 2(b - a)
V
mol·L-1 D. 2(2b - a)
V
mol·L-1
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Question 5 · Single choice · 中档
已知:$Ksp(AgCl)=1$.8×10—10 ,$Ksp(AgI)=1.5$×10—16 ,$Ksp(Ag2CrO4)=2.0$×10— 12,则下列难溶盐的饱和溶液中,Ag+浓度大小顺序正确的是
A. AgCl>AgI> Ag2CrO4 B. AgCl> Ag2CrO4>AgI C. Ag2CrO4>AgCl>AgI D. Ag2CrO4>AgI>AgCl
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Question 6 · Single choice · 中档
光谱研究表明,易溶于水的S02所形成的溶液中存在着下列平衡: 据此,下列判断中正确的是
A. 该溶液中存在着SO2分子 B. 该溶液中H+浓度是SO2- 3浓度的2倍 C. 向该溶液中加入足量的酸都能放出SO2气体 D. 向该溶液中加入过量NaOH可得到Na2SO3 、NaHSO3和NaOH的混合溶液
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Question 7 · Multiple choice · 中档
A. HClO B. Al2O3 C. N203 D. SiO2
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Question 8 · Single choice · 中档
下列化合物中既易发生取代反应,也可发生加成反应,还能使KMn04酸性溶液褪色的是
A. 乙烷 B. 乙醇 C. 丙烯 D. 苯
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Question 9 · Multiple choice · 中档
利用电解法可将含有Fe、Zn、Ag、Pt等杂质的粗铜提纯,下列叙述正确的是
A. 电解时以精铜作阳极 B. 电解时阴极发生还原反应 C. 粗铜连接电源负极,其电极反应是$Cu =Cu2+ + 2e$— D. 电解后,电解槽底部会形成含少量Ag、Pt等金属的阳极泥
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Question 10 · Single choice · 中档
A. 金属铝溶于稀硫酸中:$Al + 2H+ = A13+ + H2$↑ B. 碳酸锌溶于稀硝酸中:$CO2- 3 + 2H+ =H2O + CO2$↑
第- 3 -页 | 共29页 C. 醋酸钠水溶液中通入足量C02:2CH3COO— + $CO2 + H20 = 2CH3COOH + CO2- 3$ D. 少量Cl2通入KI溶液中:Cl2+ 2I— =2C1— + I2
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Question 11 · Single choice · 中档
短周期元素X、Y、Z所在的周期数依次增大,它们的原子序数之和为20,且Y2— 与Z+核外电子层的结构相同。下列化合物中同时存在极性和非极性共价键的是
A. Z2Y B. X2Y2 C. Z2Y2 D. ZYX
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Question 18 · Free response · 中档
(20分) 18-I(6分)已知:,如果要合成 所用的原始原料可以是
考点: 有机推断考法: 逆推法易错: 同分异构体重复或遗漏
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