【单选题】
下列关于浓<img class="kfformula" src="20200629/1593440876409321.png" data-latex="{HNO}_{3}" width="56" height="35"/>与浓<img class="kfformula" src="20200629/1593440876380803.png" data-latex="{H}_{2}{SO}_{4}" width="62" height="35"/>的叙述正确的是（ ）。
①
常温下都可用铁制容器贮存
②
露置于空气中，溶液浓度均升高
③
露置于空气中，溶液质量均减轻
④
常温下都能与铜较快反应
【单选题】
下列气体不能用浓<img class="kfformula" src="20200629/1593430244222429.png" data-latex="{H}_{2}{SO}_{4}" width="79" height="31"/>干燥的是（ ）。
①
<img class="kfformula" src="20200629/1593430244855122.png" data-latex="{NH}_{3}" width="44" height="29"/>
②
<img class="kfformula" src="20200629/1593430244252876.png" data-latex="{CO}_{2}" width="55" height="31"/>
③
HCl
④
<img class="kfformula" src="20200629/1593430244307619.png" data-latex="{SO}_{2}" width="46" height="24"/>
【单选题】
下列现象说明<img class="kfformula" src="20200629/1593440389946271.png" data-latex="{SO}_{2}" width="48" height="34"/>具有氧化性的是（ ）。
①
<img class="kfformula" src="20200629/1593440389481023.png" data-latex="{SO}_{2}" width="43" height="35"/>通入石蕊试液中使之变红
②
<img class="kfformula" src="20200629/1593440389124119.png" data-latex="{SO}_{2}" width="40" height="33"/>通入饱和<img class="kfformula" src="20200629/1593440389977383.png" data-latex="{H}_{2}S" width="46" height="32"/>溶液中析出浅黄色沉淀
③
<img class="kfformula" src="20200629/1593440389742665.png" data-latex="{SO}_{2}" width="48" height="38"/>通人氯水中使之褪色
④
<img class="kfformula" src="20200629/1593440389774880.png" data-latex="{SO}_{2}" width="44" height="37"/>通入酸性高锰酸钾溶液中使之褪色
【单选题】
等差数列<img class="kfformula" src="20190809/1565315219717157.png" data-latex="\left \{ {{a}_{n}} \right \} "/>首项<img class="kfformula" src="20190809/1565315219801596.png" data-latex="{a}_{1}=1"/>，公差<img class="kfformula" src="20190809/1565315219560191.png" data-latex="d=-3"/>，当<img class="kfformula" src="20190809/1565315219192999.png" data-latex="{a}_{n}=-56"/>时，项数<img class="kfformula" src="20190809/1565315219715609.png" data-latex="n"/>等于（ ）
①
18
②
19
③
20
④
21
【单选题】
设<img class="kfformula" src="20200624/1592994110275229.png" data-latex="{N}_{A}" width="43" height="27"/>为阿伏加德罗常数的值，现有0.3mol/L<img class="kfformula" src="20200624/1592994110834086.png" data-latex="{K}_{2}{SO}_{4}" width="63" height="30"/>溶液，1L溶液中<img class="kfformula" src="20200707/1594086644585029.png" data-latex="{S{O}_{4}}^{2-}" width="68" height="32"/>有（ ）<img class="kfformula" src="20200624/1592994110685297.png" data-latex="{N}_{A}" width="49" height="27"/>个。
①
0.6
②
0.9
③
0.3
④
1
【单选题】
欲使0.1mol/L的<img class="kfformula" src="20200629/1593414371655621.png" data-latex="{CH}_{3}COONa" width="110" height="34"/>溶液中，c（<img class="kfformula" src="20200629/1593414371705821.png" data-latex="{Na}^{+}" width="58" height="33"/>）/c（<img class="kfformula" src="20200629/1593414371315923.png" data-latex="{CH}_{3}{COO}^{-}" width="118" height="34"/>）更接近于1:1 ，应采取的措施是（）。
①
加水稀释
②
加入NaOH固体
③
加入适量<img class="kfformula" src="20200629/1593414371383535.png" data-latex="{CH}_{3}COOH" width="98" height="30"/>
【单选题】
在一盛有饱和<img class="kfformula" src="20200629/1593419441885841.png" data-latex="{Na}_{2}{CO}_{3}" width="73" height="34"/>溶液的烧杯中插入惰性电极，保持温度不变，通电一段时间后（ ）。
①
溶液的浓度不变，有晶体析出
②
溶液的PH值增大
③
溶液的浓度增大
④
<img class="kfformula" src="20200629/1593419441122917.png" data-latex="{Na}^{+}和{CO3}^{2-}" width="113" height="29"/>的浓度减小
【单选题】
将<img class="kfformula" src="20200623/1592893281553384.png" data-latex="{Na}_{2}{O}_{2}" width="84" height="32"/>投入到<img class="kfformula" src="20200623/1592893281760005.png" data-latex="{FeCI}_{2}" width="69" height="31"/>溶液中，可观察到的现象是（）。①生成白色沉淀②生成红褐色沉淀③有气泡产生④溶液变成棕黄色
①
③④
②
①②
③
①②④
④
②③
【单选题】
在<img class="kfformula" src="20200706/1594030362363581.png" data-latex="100mL\, \, 0.01mo1\cdot {L}^{-1}" width="192" height="36"/> KCl溶液中，加入<img class="kfformula" src="20200706/1594030362545282.png" data-latex="1mL\, \, 0.01mo1\cdot {L}^{-1}" width="189" height="38"/><img class="kfformula" src="20200629/1593415627443157.png" data-latex="{AgNO}_{3}" width="81" height="33"/>溶液，下列说法正确的是(已知AgCl的<img class="kfformula" src="20200706/1594030362457889.png" data-latex="{K}_{sp}" width="55" height="35"/>＝1.8×<img class="kfformula" src="20200706/1594030362188816.png" data-latex="{10}^{-10}" width="70" height="30"/>)( )。
①
有沉淀但不是AgCl
②
有AgCl沉淀析出
③
无法确定
④
无AgCl沉淀析出
【单选题】
在313K时，水的Kw=<img class="kfformula" src="20200629/1593411014820108.png" data-latex="{3.8\times 10}^{14}" width="80" height="30"/>，若在313K时，c（<img class="kfformula" src="20200629/1593411014176240.png" data-latex="{H}^{+}" width="53" height="27"/>）=1.0×<img class="kfformula" src="20200629/1593411014850827.png" data-latex="{10}^{-7}" width="50" height="34"/>mol/L的溶液（）。
①
呈碱性
②
呈酸性
③
呈中性
④
无法判断
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=1){kind=link}
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=2){kind=link}
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=4){kind=link}
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=5){kind=link}
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=6){kind=link}
%7D_%7B2%7D%7BCO%7D_%7B3%7D%22%20width%3D%22105%22%20height%3D%2230%22/%3E%5D%E3%80%82%E8%BF%99%E4%B8%89%E4%BB%B61760%E5%B9%B4%E9%93%9C%E9%93%B8%E7%9A%84%E5%9B%BD%E5%AE%9D%E5%9C%A8240%E5%B9%B4%E5%90%8E%E7%9C%8B%E4%B8%8A%E5%8E%BB%E4%BE%9D%E7%84%B6%E7%86%A0%E7%86%A0%E7%94%9F%E8%BE%89%EF%BC%8C%E4%B8%8D%E7%94%9F%E9%94%88%EF%BC%8C%E4%B8%8B%E5%88%97%E5%AF%B9%E5%85%B6%E5%8E%9F%E5%9B%A0%E7%9A%84%E5%88%86%E6%9E%90%EF%BC%8C%E6%9C%80%E5%8F%AF%E8%83%BD%E7%9A%84%E6%98%AF(%20)%E3%80%82&pn=10){kind=link}