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Question 1 · Single choice · 中档
元素 <sup>295</sup><sub>118</sub>Og 中文名为(气奥),是一种人工合成的稀有气体元素,下列说法正确的是( )
A. 核外电子数是 118 B. 中子数是 295 C. 质量数是 117 D. 第六周期0族元素
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Question 2 · Single choice · 中档
A. 次氯酸漂白 B. 盐酸除锈 C. 石油分馏 D. 煤干馏
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Question 4 · Single choice · 中档
A. Cu 加入氯化铁 B. Zn 加入硫酸 C. H₂ 通入灼热氧化铜 D. 高温下水蒸气通入 Fe
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Question 5 · Single choice · 中档
25℃时,0.005mol/L Ba(OH)₂ 中 H⁺浓度是( )
A. 1×10⁻¹² mol/L B. 1×10⁻¹³ mol/L C. 5×10⁻¹² mol/L D. 5×10⁻¹³ mol/L
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Question 7 · Free response · 中档
已知有一种烃的结构类似自行车,简称“自行车烃”,如图所示,下列关于它的叙述正确的是
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Question 8 · Single choice · 中档
聚异戊二烯 $\scriptstyle \sum \mathrm { C H } _ { 2 } - { \mathrm { C } } = { \mathrm { C H } } - { \mathrm { C H } } _ { 2 } { \scriptstyle \mp } ,$ 的单体是( ) n
A. $\stackrel { \mathrm { C H } _ { 3 } } { \mathrm { C H } _ { 2 } } - \stackrel { \mathrm { C H } _ { 3 } } { \mathrm { C } } = \mathrm { C H } - \mathrm { C H } _ { 2 }$ B. $( \mathrm { C H } _ { 2 } ) _ { 2 } \mathrm { C } { = } \mathrm { C H } { - } \mathrm { C H } _ { 2 }$ C. $( \mathrm { C H _ { 3 } } ) _ { 2 } \mathrm { C = C H - C H _ { 2 } }$ D. $\stackrel { \mathrm { C H } _ { 3 } } { \mathrm { C H } _ { 2 } } = \stackrel { \mathrm { C H } _ { 3 } } { \mathrm { C } } - \mathrm { C H } = \mathrm { C H } _ { 2 }$
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Question 9 · Single choice · 中档
A. 含有共价键的化合物是共价化合物 B. 含有极性键的分子可能是非极性分子 C. 有电子转移的反应是氧化还原反应 D. 水溶液中能完全电离的电解质是强电解质
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Question 10 · Single choice · 中档
用镁带和稀硫酸反应产生氢气来测定氢气的气体摩尔体积,所用的步骤有①冷却至室温,②调节使水准管和量气管液面持平,③读数。正确的顺序是( )
A. ①②③ B. ①③② C. ③①② D. ③②①
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Question 11 · Single choice · 中档
关于离子化合物 $\mathrm { N H } _ { 5 }$ (H 有正价和负价)下列说法正确的是( )
A. N 为+5 价 B. 阴阳离子个数比是1:1 C. 阴离子为8电子稳定结构 D. 阳离子 电子数为11的
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Question 12 · Single choice · 中档
A. 硝酸钡,稀硫酸 B. 稀盐酸,氯化钡 C. 稀硫酸,氯化钡 D. 稀硝酸,氯化钡
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Question 13 · Single choice · 中档
用标准盐酸溶液滴定未知浓度的氢氧化钠溶液,用甲基橙作指示剂,下列说法正确的是( )
A. 可以用酚酞代替指示剂 B. 滴定前用待测液润洗锥形瓶 C. 若氢氧化钠吸收少量 $\mathrm { C O } _ { 2 }$ ,不影响滴定结果 D. 当锥形瓶内溶液由橙色变为红色,且半分钟内不褪色,即达到滴定终点
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Question 14 · Single choice · 中档
下列物质分离(括号内的物质为杂质)的方法错误的是( )
A. 硝基苯(苯)--蒸馏 B. 乙烯 $( \mathrm { S O } _ { 2 } )$ --氢氧化钠溶液 C. 己烷(己烯)--溴水,分液 D. 乙酸乙酯(乙醇)--碳酸钠溶液,分液 D乙酸乙酯(乙醇)--碳酸钠溶液,分液
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Question 16 · Single choice · 中档
在 pH 为 1 的 100mL0.1mol/L 的 $\mathrm { A l C l } _ { 3 }$ 中,加入300mL0.1mol/L 的氢氧化钠溶液后铝元素的存在形式是( )
A. $\mathbf { A l O } _ { 2 } \mathrm { - }$ B. $\mathrm { A l } ^ { 3 + }$ C. Al(OH)<sub>3</sub> D. $\mathrm { A l ^ { 3 + } , \ A l ( O H ) } ;$ 3
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Question 17 · Single choice · 中档
关于下列装置,叙述错误的是( )
A. 石墨电极反应 $\mathrm { O } _ { 2 } { + } 4 \mathrm { H } ^ { + } { + } 4 \mathrm { e } { \longrightarrow } 2 \mathrm { H } _ { 2 } \mathrm { O }$ B. 鼓入少量空气,会加快Fe的腐蚀 C. 加入少量NaCl,会加快Fe的腐蚀 D. 加入HCl,石墨电极反应式: $2 \mathrm { H } ^ { + } { + } 2 \mathrm { e } { } \mathrm { H } _ { 2 }$
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Question 19 · Single choice · 中档
已知反应式: $\mathrm { m } \mathrm { X } ( \mathrm { g } ) { \mathrm { + n } } \mathrm { Y } ( ? ) \mathrm { p Q } ( \mathrm { s } ) { \mathrm { + } } 2 \mathrm { m } Z ( \mathrm { g } )$ ,已知反应已达平衡,此时 $\mathrm { c ( X ) } { = } 0 . 3 \mathrm { m o l / L }$ ,其他条件不变,若容器缩小到原来的 ${ \frac { 1 } { 2 } } , \ { \mathrm { c ( X ) = 0 . 5 m o l / L } }$ ,下列说法正确的是( )
A. 反应向逆方向移动 B. Y 可能是固体或液体 C. 系数 $\mathrm { n } { > } \mathrm { m }$ D. Z的体积分数减小
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Question 20 · Single choice · 中档
常温下 $0 . 1 \mathrm { { m o l / L } \textcircled { 1 } C H _ { 3 } C O O H }$ $\textcircled { 2 } \mathrm { { N a O H } }$ 、③ $\mathrm { C H _ { 3 } C O O N a }$ ,下列叙述正确的是( )
A. ①中 $[ \mathrm { C H _ { 3 } C O O H ] } \mathrm { > } [ \mathrm { C H _ { 3 } C O O \mathrm { - } ] } \mathrm { > } [ \mathrm { H ^ { + } } ] \mathrm { > } [ \mathrm { O H ^ { - } } ]$ B. ①②等体积混合后,醋酸根离子浓度小于③的二分之一 C. ①③等体积混合以后,溶液呈酸性,则 $( \mathrm { N } \mathbf { a } ^ { + } ) { > } ( \mathrm { C H } _ { 3 } \mathrm { C O O } ^ { - } ) { > } ( \mathrm { H } ^ { + } )$ D. ①②等体积混合以后,水的电离程度比①③等体积混合的电离程度小
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