练习册

  • 练习册
  • 试题
    精英家教网 > 高中地理 > 题目详情

    【题目】H＋浓度相同的等体积的两份溶液A和B，A为盐酸，B为醋酸，分别和锌反应，若最后仅有一份溶液中存在锌，且放出氢气的体积相等，则下列说法正确的是

    ①反应所需要的时间B>A ②开始反应时的速率A>B

    ③参加反应的锌的物质的量A=B ④反应过程的平均速率B>A

    ⑤盐酸中有锌剩余 ⑥醋酸中有锌剩余

    A．③④⑤ B．③④⑥ C．②③⑤ D．②③⑤⑥

    【答案】A

    【解析】认识到c(H＋)相同的两溶液中c(CH3COOH)>c(HCl)是解答本题的关键。锌与盐酸和醋酸的反应本质相同：Zn＋2H＋===Zn2＋＋H2↑。起始时c(H＋)相同，因此开始时反应速率相同；因放出H2的体积相同，所以参加反应的锌相等；随着反应的进行，醋酸的电离平衡被破坏，向着电离方向移动，故H＋的变化小于盐酸，所以在反应过程中醋酸中生成氢气的速率大于盐酸中的；锌不可能在醋酸中剩余，因为H＋浓度相等的同体积醋酸和盐酸相比，醋酸的浓度大于盐酸的浓度。

    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中地理 来源： 题型：

    【题目】结合语境，根据汉语或首字母提示用单词的适当形式填空。

    1.We will talk about this later when you’re feeling ________ (更冷静).

    2. I tried to tell her but she ________ (不理睬) me.

    3. I’m rather ________ (关心) about my brother’s health.

    4. If a tooth feels very l________, your doctor may advise that you get it taken out.

    5. When the night came, they drew the c________ and locked the doors.

    6. She was deeply ________ (心烦的) about the way her father treated her.

    7. She used to________ (分享) my troubles as well as my joys.

    8. After a ________ (系列) of exercises, he has finally passed the driving test.

    9. He went to town for the ________ (目的) of buying a new television.

    10.We were woken in the night by ________ (雷).

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】The explorer got a disease in blood for the of fresh vegetables and fruit.

    A. sake

    B. lack

    C. ignorance

    D. benefit

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】七选五

    根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    People with bad manners are rejected in the world of work. They do not get good jobs or promotions. Their business do not succeed. 1 They are liked and supported. They have friends, luck and success. When you improve your manners, you improve your chances of success. The following are several examples of good manners.

    Be polite to everyone you meet. 2 For example, when you go on a job interview, be polite to the desk clerk as they can affect you chances of success. Use these magic words as often as possible: Hello, Please, Excuse me and Sorry, and use the two most important words: Thank you.

    Use good manners in all of your communications. Examples: Return telephone and email messages within 24 hours; If you receive a rude message, do not respond with rudeness, but be polite; Do not interrupt people. _____3_____

    4 Cutting in front of other cars only gains you a few seconds of time. If you are polite, patient and calm, you will arrive safely and feel more relaxed. A good sense of humor shows good manners. 5 Before starting important conversations, meals or meetings, turn off your mobile phone. Ignoring people while you use your phone is impolite.

    A. Use good manners when driving.

    B. People with good manners are accepted.

    C. It is better to make a careful plan before you take action.

    D. You should learn good manners from people around you.

    E. Tell jokes or pass on humorousstories that everyone will enjoy.

    F. Make sure people are ready to listen to you before you start talking.

    G. You will never regret being polite, but you might regret being rude.

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】在“探究小车的速度随时间变化的规律”的实验中，某同学操作过程中有以下实验步骤：

    A．拉住纸带，将小车移至靠近打点计时器处，先放开纸带，再接通电源；

    B．将打点计时器固定在长木板上，并连接好电路；

    C．把一条细绳拴在小车上，细绳跨过定滑轮，下边吊着适当重的钩码，放手后看小车能否在木板上做平稳的加速运动；

    D．断开电源，取下纸带；

    E．把一端附有定滑轮的长木板平放在实验桌上，并使附有定滑轮的一端伸出桌面；

    F．将纸带固定在小车尾部，并穿过打点计时器的限位孔；

    G．换上新纸带，重复操作两次。

    （1）其中有错误的步骤是____________；应改正为____________________。

    （2）将改正后的步骤按合理的顺序写在横线上：

    步骤顺序为______________。

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】Some myths are stories told since ancient times to explain the causes for natural happenings. The Greek myth that explains why there are changes of __【1】__ is about Demeter, the goddess of the harvest. She had a daughter, Persephone, whom she loved very much. Hades, god of the underworld, fell in love with Persephone, and he asked Zeus, the __【2】__ of the gods, to give Persephone to him as his __【3】_. Zeus did not want either to disappoint Hades or to upset Demeter, so he said he would not agree to the marriage, but neither would he __【4】__ it. Hades, therefore, decided to take the girl without __【5】__. When Persephone was picking flowers in the garden, he seized her and took her to the underworld. When Demeter __【6】__ what happened to Persephone, she became so _【7】__ that she caused all plants to _【8】__ People were in __【9】__ of starving. But Demeter was determined not to let crops grow __【10】__ her daughter, Persephone, was returned to her. __【11】__, still not wanting to disappoint Hades, decided upon a condition for Persephone’s __【12】_. She could go back to her mother if she had not __【13】__ anything while she was in the underworld. Demeter __【14】__ it because she did not know that Persephone had eaten several pomegranate(石榴) seeds in the underworld. When Zeus __【15】__ this, he agreed that Persephone could spend part of the year with her __【16】__, but he added that since she had eaten the seeds, she must spend part of the year in the underworld. And so it __【17】__ that when Persephone is in the underworld, Demeter is sad and therefore __【18】__ not let the crops grow. That is __【19】_ we have winter when plants do not grow. When Persephone returns, Demeter is _【20】__, it is spring, and plants begin to grow again.

    A. periods B. seasons C. time D. age

    A. winner B. ruler C. advisor D. fighter

    A. wife B. lover C. partner D. daughter

    A. forbid B. forgive C. admit D. accept

    A. arrangement B. warning C. reason D. permission

    A. let out B. worked out C. thought out D. found out

    A. excited B. tired C. angry D. serious

    A. grow fast B. start growing C. stop growing D. grow slowly

    A. danger B. hope C. turn D. case

    A. since B. until C. after D. when

    A. Persephone B. Zeus C. Demeter D. Hades

    A. return B. change C. marriage D. journey

    A. stolen B. found C. eaten D. heard

    A. understood B. refused C. doubted D. accepted

    A. discovered B. studied C. forgot D. prepared

    A. daughter B. mother C. god D. ruler

    A. works B. remains C. happens D. starts

    A. should B. can C. dare D. will

    A. where B. because C. why D. how

    A. nice B. friendly C. fresh D. happy

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】She showed the visitors around the museum, the construction______had taken more than three years.

    A. for which

    B. with which

    C. of which

    D. to which

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】My parents strongly _________ my _________ to go to college out of Beijing, because they don't like my being

    far away from them.

    A. enjoy; wish B. oppose; attempt

    C. advocate; effort D. object; desire

    查看答案和解析>>

    科目：高中地理 来源： 题型：

    【题目】书面表达（满分20分）

    假如你是李华，收到笔友Mary的如下来信。

    Dear Li Hua,

    How are you?

    I am having trouble with my deskmate Jenny at the moment. Last week, we had a maths test. The test was important and everyone had prepared for it except Jenny.

    During the test, she asked me to help her. I refused and didn’t let her copy from my paper. As a result, she failed the test. She is angry with me and hasn’t talked to me since then. Now I don’t know how to deal with this problem. Can you give me some advice?

    I’m looking forward to your reply.

    Yours,

    Mary

    请你给Mary回信，给她提出建议。

    注意：

    1. 词数100左右；

    2. 短文的开头和结尾已为你写好，但不计入总词数。

    Dear Mary,

    I’m sorry you are having trouble with your friend. Here are some tips that may help you.

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    ____________________________________________________________________________________________

    Yours,

    Li Hua

    查看答案和解析>>

    同步练习册答案