试题与答案

(10分)工业上电解制烧碱的技术是用离子交换膜法,主要原料是饱和食盐水。下图为离

题型:填空题

题目:

(10分)工业上电解制烧碱的技术是用离子交换膜法,主要原料是饱和食盐水。下图为离子交换膜法电解原理示意图:

请回答下列问题:

(1)电解槽中部的阳离子交换膜把电解槽隔成了阴极室和阳极室,这种阳离子交换膜,只允许溶液中的__________通过(填写下列微粒的编号),而两边的水不能自由流通。

①H+   ② Cl-   ③Na+   ④OH-

(2)A极为电解槽的________极,电极反应式为__________________________________,

(3)如果没有阳离子交换膜,阴阳两极的某两种产物在常温下会在溶液中发生反应而使烧碱不纯,其反应的离子方程式为___________                  

(4)若将标准状况下6.72L的阳极气体通入热的氢氧化钠溶液中,反应中只有一种元素的化合价发生改变,得到了两种含氯化合物,其中还原产物与氧化产物物质的量之比为5:1,写出该反应的离子方程式_____________________________________________。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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A.2

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C.7

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A.behind

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A.next to

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A.the playground

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D.the office building小题5:The students have meals in __________.

A.the dining hall

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题型:综合题

阅读下列材料

材料一齐威王当上霸主以后,燕、赵、韩、魏等国都来朝贡,只有西方的秦国没有来。中原各国叫它“西戎”把它看作野蛮民族,瞧不起它,很少跟它来往,还不时派兵侵夺它的土地。

秦孝公求贤令:三晋攻夺我先君河西地,诸侯卑秦,丑莫大焉。宾客郡臣有能出奇计强秦者,吾且尊官,与之分土。

材料二商鞅变法规定,“编民为什伍”,五家为一伍,两伍为什。又规定什、伍之内各家互相纠察,“不告 * * 者腰斩,告 * * 者与斩敌同赏,匿 * * 者与降敌同罚。”他认为“行刑重其轻者,轻者不至,则重者无从至矣”。即对轻罪严厉处罚可以杜绝犯重罪。

“燔史书而明法令”。认为“诗、书、礼、乐、善、修、仁、廉、辩、慧,国有十者,必至贫弱。”还把“礼、乐,诗、书,修善、孝悌,诚信、贞廉,仁、义,非兵、羞战”说成了“六虱”,反对个根据这六种情况授予官职。奖励耕织。生产粮食布帛多的人可免除徭役,凡从事末业及游手好闲致贫者,全家没入官府,罚为官奴婢

回答:(1)根据材料一,扼要分析秦孝公变法图强的原因。

(2)历史上对商鞅变法的评价,历来众说纷纭。依据材料二中的变法内容,简要评价商鞅变法的功过是非。

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