问题 单项选择题

我国实验室最适宜的朝向是()。

A、东向

B、西向

C、南向

D、北向

答案

参考答案:C

问答题

某化学学习小组欲探究铁及其化合物的氧化性和还原性.请你协助他们完成实验报告.

(1)实验目的:探究铁及其化合物的氧化性和还原性

(2)实验试剂及仪器:

试剂:氯化亚铁溶液、氯化铁溶液、氯水、KSCN溶液、铁粉、锌片、铜片、稀硫酸

仪器:胶头滴管外,你认为本实验必不可少的一种玻璃仪器是.

(3)实验记录(在仿照①实验作答,划线部分不必填写)

序号实验设计实验观察(主要现象)离子方程式解释与结论
在铁粉中滴

入稀硫酸

铁粉溶解,溶液由无

色变成浅绿色,有无

色无味的气体生成

Fe+2H+=H2↑+Fe2+

Fe具有还原性

氯化亚铁溶液中滴入KSCN溶液,再加入氯水滴入KSCN溶液无明

显变化,加入氯水立

即变成血红色

____________
氯化亚铁溶液加

入锌片

______Fe2++Zn=Fe+Zn2+______

__________________

Fe3+具有氧化性

(4)学习小组的同学将从本实验中获得的知识推广到其他类物质的学习,请判断下列物质既有氧化性又有还原性的是______

A、Cl2 B、Na  C、Mg2+D、H2O2

(5)在实验②中,有部分同学在氯化亚铁溶液中滴入KSCN溶液后,就出现了血红色,你认为是什么原因:______;你将对实验员在配制氯化亚铁溶液时,提出的建议是______.

(6)在配制氯化铁溶液时,由于实验员失误,可能导致溶液中含有少量的Fe2+,为帮助实验员进行检验少量Fe2+的存在,请从下列物质中选择合适的试剂______

A、KSCN溶液          B、稀盐酸     C、KMnO4溶液      D、NaOH溶液.

阅读理解

Choose Winners Club, and you choose to be a winner! The Winners Club is a bank account specially designed for teenagers. It has been made to help you better manage your money. The Winners Club is a transaction account(交易账户)where you receive a key-card so you can get to your money 24/7 – that’s 24 hours a day, 7 days a week! It’s a club with impressive features for teenagers: No account keeping fees! You’re no millionaire so we don’t expect you to pay large fees. In fact, there are no account keeping or transaction fees! Excellent interest rates!

You want your money to grow? The Winners Club has a good rate of interest which gets even better if you make at least two deposits(储蓄)without taking them out in a month. Convenient Teenagers are busy – we get that. You may never need to come to a bank at all. With the Winners Club you can choose to use handy tellers and to bank from home using the phone and the Internet. You can have money directly deposited into your Winners Club account. This could be your pocket money or your pay from your part-time job!

Mega Magazine included along with your regular report, will definitely assure you  to receive a FREE magazine full of good ideas to make even more of your money. There are also fantastic offers and competitions only for Winners Club members. The Winners Club is a great choice for teenagers. And it is so easy to join. Simply fill in an application form. You will have to get permission from your parent or guardian (so we can organize that cool key – card) but it is easy. We can’t wait to hear from you. It’s the best way to choose to be a winner!

小题1:Which of the following is TRUE about the Winners Club?

A.Special gifts are ready for parents.

B.The bank opens only on work days.

C.Services are convenient for its members.

D.Fees are necessary for the account keeping.小题2:The Winners Club provides magazines which ________.

A.encourage spending

B.are free to all teenagers

C.are full of adventure stories

D.help to make more of your money小题3:If you want to be a member of the Club, you must ________.

A.be an Internet user

B.be permitted by your parent

C.have a big sum of money

D.be in your twenties小题4:What is the purpose of this text?

A.To set up a club.

B.To provide part-time jobs.

C.To organize key-cards.

D.To introduce a new banking service.