[题目]下列关于硅酸的说法正确的是( )A．硅酸可以通过SiO2和水的化合反应制得B．用反应Na2SiO3+2HCl===H2SiO3+2NaCl制取硅酸是利用了可溶性酸制难溶性酸的原理C．硅酸难溶于水.不能与NaOH溶液反应D．硅胶可用作袋装食品的干燥剂题目和参考答案——青夏教育精英家教网—

精英家教网 > 高中地理 > 题目详情

【题目】下列关于硅酸的说法正确的是( )

A．硅酸可以通过SiO2和水的化合反应制得

B．用反应Na2SiO3＋2HCl===H2SiO3(胶体)＋2NaCl制取硅酸是利用了可溶性酸制难溶性酸的原理

C．硅酸难溶于水，不能与NaOH溶液反应

D．硅胶可用作袋装食品的干燥剂

【答案】D

【解析】SiO2不溶于水也不能与水反应生成硅酸，A项错误；B项中反应是利用了强酸制弱酸的原理，B项错误；硅酸虽难溶于水，但可与强碱溶液反应生成硅酸盐，C项错误。答案选D。

练习册系列答案

课课练与单元测试系列答案

世纪金榜小博士单元期末一卷通系列答案

单元测试AB卷台海出版社系列答案

黄冈新思维培优考王单元加期末卷系列答案

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！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：高中地理 来源： 题型：

【题目】It is pretty well understood controls the flow of carbon dioxide in and out the atmosphere today.

A. that

B. when

C. what

D. how

查看答案和解析>>

科目：高中地理 来源： 题型：

【题目】阅读理解

阅读下列短文，从每题所给的四个选项（A 、B 、C 和 D ）中，选出最佳选项。

Miracles Happen

101 Inspirational Stories about Hope, Answered Prayers, and Divine Intervention

Miracles happen every day! Miracles can happen to anyone at any time. You will be instructed by these personal stories of faith, prayer, and healing that show a higher power at work in our lives.

The Dating Game

101 Stories about Looking for Love and Finding Fairy tale Romance!

Searching for "The One"? This fun new book about dating — whether it sparked a lifelong love or a laugh with friends — will give you a boost as you search for your soul mate. Read these 101 stories about how couples met, good and bad dates, maintaining the relationship, second chances, the Internet, and all the ups and downs of dating, love, and romance. For men and women from 21 to 91.

O Canada The Wonders of Winter

101 Stories about Bad Weather, Good Times and Great Sports

Canadian winters are boring! But this collection will warm your heart, brighten your day, and lift your spirits. Any Canadian — from east to west coast; from city to rural — will love the 101 stories in this new collection about embracing those long winter days and making the most of them. Filled with amusing and encouraging stories about weathering the cold, creating warm memories with family and friends, and playing great winter sports.

Just Us Girls

101 Stories about Friendship for Women of All Ages

A woman's friends are the family she picks for herself. Whether it's about something funny or serious, our friends are the first ones we think to call. They are a constant source of support and encouragement. This collection of 101 touching and amusing stories celebrates all that is special about the bonds that women share with their friends — the unique spirit of female friendship. You'll love reading and sharing these stories with your friends.

【1】What do the four books have in common?

A．They all have 101 stories.

B．They are all about weather.

C．They are sold at the same price.

D．They are published at the same day.

【2】Which book should you buy if you are in love with somebody?

A．O Canada The Wonders of Winter.

B．Miracles Happen.

C．The Dating Game.

D．Just Us Girls.

【3】Where can we find the passage?

A．A news report.

B．An education column.

C．A science report.

D．A tour guide.

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。

Learning English is challenging because of the various rules and exceptions to the rules. The best way to learn English is to hear it spoken and repeat the words as you hear them. 【1】You will learn how to make English a daily part of your life in order to learn to speak it quickly.

【2】 Ask a friend to help you write letters of English alphabet on index cards. You should write a letter on each card. Practise the letters by mixing up the cards and saying the letters. You can ask your friend to help you pronounce the letters and quiz you on your knowledge.

Make your own videos in English. If you have a video camera, you can tape yourself speaking English and practice along with your own video. 【3】 Watch your videos daily, and repeat what is being said.

Get a private tutor. A professional English instructor can give you one-on-one instruction that will help you understand the rules of English. Your instructor can teach you how to write and speak English. 【4】You can also inquire at your local community college.

Watch movies with English subtitles. When watching a movie in your native language, use the English subtitles so you will understand the connection between your language and English.