您所在的当前位置：高中化学试题 >

氧化剂和还原剂

> 高铁酸钾（ K 2FeO 4）是一种新型的自来水处理剂，它的性质和作用是（　　） A．有强氧化性，可消毒杀菌，还原产物能吸附水中杂质 B．有强还原性，可消毒杀菌，氧化产物能吸附水中杂质 C．有强氧化性，能吸附水中杂质，还原产物能消毒杀菌 D．有强还原性，能吸附水中杂质，氧化产物能消毒杀菌

问题：

发布时间：2024-09-09

高铁酸钾（ K ₂FeO ₄）是一种新型的自来水处理剂，它的性质和作用是（　　）

A．有强氧化性，可消毒杀菌，还原产物能吸附水中杂质

B．有强还原性，可消毒杀菌，氧化产物能吸附水中杂质

C．有强氧化性，能吸附水中杂质，还原产物能消毒杀菌

D．有强还原性，能吸附水中杂质，氧化产物能消毒杀菌

参考答案：

提问用户：uf***i7a

可能感兴趣的题目：

1 Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit (学分) which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester (学期). A typical course consists of three classes per week for fifteen weeks; while attending a university a student will probably take four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice. For every course that he follows, a student is given a grade, which is recorded, and the record is available for the student to show to prospective(预期的) employers. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm (热情). The effective work of maintaining discipline is usually performed by students who advise the academic authorities (权威). Any student who is thought to have broken rules, for example, by cheating has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career. 72. Normally a student would at least attend ______ classes per week. A. 36 B. 12 C. 20 D.15 73. According to the first passage an American student is allowed ______. A. to live in a different university B. to take a particular course in a different university C. to live at home and drive to classes D. to get two degrees from two different universities 74. American students are usually under pressure of work because ______. A. their academic performance will affect their future careers B. they are heavily involved in student affairs C. they have to observe university discipline D. they want to run for positions of authoring 75. Some students are enthusiastic for positions in student organizations probably because_____. A. they hate the constant pressure and strain of their study B. they will then be able to stay longer in the university C. such positions help them get better jobs D. such positions are usually well paid
2 宁西铁路是我国跨世纪铁路建设中一条横贯东西的铁路干线，东起南京，西至西安，途经五个省区，总长1 075．6千米。读图完成小题。小题1:宁西铁路建设的重要意义是 ①改善中西部的投资环境，扩大对外开放 ②带动沿线地区经济的发展 ③促进沿线地区煤铁资源的开发 ④激活全国铁路网，增强路网的灵活性 A．①②③④ B．②④ C．①②③ D．①②④ 小题2:关于我国交通运输的正确叙述是 A．不同省区运输网密度不同，地区运输网密度的大小，反映地区交通运输通达性的强弱 B．我国东部地区靠海，所以水运发达；中西部地区河流少，所以铁路网、公路网稠密 C．交通运输网的发展与区域经济发展是没有联系的 D．当前西部交通发展中，铁路运输因为运量大而成为发展最快的运输方式
3 The minister is busy with important ____ of state. [ ] A. business B. matter C. events D. affairs
4 Natural ways of keeping time In ancient times, people had to use the sun and the moon to tell time. They got up when the sun came up and worked in the fields until the sun went down. Man-made things The sand clock is made of two glass balls joined by a narrow neck. The top ball was filled with sand. The sand slowly moved through the neck into the bottom ball. People knew how much time had passed when all the sand had fallen to the bottom ball. People also made the water clock. They made a small hole near the bottom of a pot. Then they filled the pot with water. Markings inside the pot showed how much time passed as the water dripped (滴) out of the hole. Nature’s Clocks in Living Things ◆Animals’ Body Clock Animals do not need clocks to know time. They have a way of telling time by their bodies. Birds know when to fly to warmer places before winter. Some animals know when to keep more food for the cold winter months. Some fish know when it is time to move up the river and lay eggs. ◆Plants have their own clocks Plants also have their own clocks to keep time. Plants know when to open flowers or when to drop their leaves. ◆The Body Clock in Human Beings People also have their own body clocks. When we get used to our lives, our body clocks can be very accurate (准确的). It can tell us when it is time to wake up. It can also tell us when to eat or to go to sleep. 小题1:How could an ancient farmer know when to go back home in the daytime? A．By looking at the moon. B．By looking at the stars. C．By looking at the sun. D．By feeling whether tired or not. 小题2: How many kinds of living things with nature’s clocks are mentioned here? A．2. B．3. C．5 D．6. 小题3:From the passage, we know what man-made things have in common is that_______. A．both of them have a hole. B．both of them are designed with glass balls. C．both of them can be used only once. D．both of them tell time in the same way
5 化学中常用图像直观的描述化学反应的进程或结果。下列图像描述正确的是 [ ] A．根据图①可判断反应CH 3OH(g)+H 2O(g)=CO 2(g)+3H 2(g)的ΔH<0 B．图②表示25℃时，用0.1 mol/L盐酸滴定20 mL 0.1 mol/LNaOH溶液的pH随加入酸体积的变化 C．根据图③（S表示溶解度），A点表示T1℃时甲为饱和溶液，乙溶液未饱和 D．根据图④可判断可逆反应“A 2(g)+3B 2(g) 2AB 3(g)”的ΔH＞0
6 When for his view about his teaching job, Philip said he found it very interesting and rewarding. A．asking B．asked C．having asked D．to be asked
7 亚洲的河流从中间流向周边的海洋，说明 A.地形中间高，四周低 B.地形中间低，四周高 C.地形南高北低 D.地形西高东低
8 某无色溶液中只可能含有Na + 、Ba 2 +、 Cl 一、 Br 一、SO 3 2 一、SO 4 2 一，对该溶液进行下列实验，实验操作和现象如下表：步骤操作现象（1）取少量溶液滴加几滴石蕊试液溶液变蓝（2）另取少量溶液滴加过量氯水，再加入CCl4振荡，静置上层无色,下层呈橙红色（3）取(2)上层溶液,加入过量Ba(NO3)2溶液和稀HNO3，过滤有白色沉淀产生（4）向（3）的滤液中加入过量AgNO3溶液和稀HNO3 有白色沉淀产生下列结论正确的是（） A．可能含有 Cl一、 SO32一、SO42一 B．肯定没有 Ba2 +、Cl一、Br一 C．不能确定 Na+ 、 SO32一、SO42一 D．肯定含有 Na+、Br一、SO32一
9 已知实数a，b满足，则2008a 2-2009ab+3a-3b+23的值是 A.1 B.3 C.21 D.2009
10 保护自然环境，开发绿色能源，实现旅游与环境的协调发展（1）某植物园的建筑屋顶有太阳能发电系统，用来满足园内用电需要．已知该发电系统的输出功率为1.0×10 5W，输出电压为220V．求： ①按平均每天太阳照射6小时计，该发电系统一年（365天计）能输出多少电能？ ②该太阳能发电系统除了向10台1000W的动力系统正常供电外，还可以同时供园内多少盏功率为100W，额定电压为220V的照明灯正常工作？ ③由于发电系统故障，输出电压降为110V，此时每盏功率为100W、额定电压为220V的照明灯消耗的功率等是其正常工作时的多少倍？