问题 选择题

下列离子方程式书写正确的是(  )

A.用铂电极电解氯化镁溶液:Cl-+2H2O

 通电 
.
 
Cl2↑+H2↑+2OH-

B.NaHSO4溶液中滴入Ba(OH)2溶液至中性:H++SO42-+Ba2+十OH-═BaSO4↓+H2O

C.在H2O2中加入酸性KMnO4溶液:2MnO4-+5H2O2+6H+═2Mn2++5O2↑+8H2O

D.溴乙烷与6mol/L氢氧化钠水溶液共热:C2H5Br+OH-

  △  
.
 
CH2=CH2↑+Br-+H2O

答案

A、用铂电极电解氯化镁溶液的离子方程式为:Mg2++2Cl-+2H2O

 通电 
.
 
Cl2↑+H2↑+Mg(OH)2↓,氢氧化镁是难电离的物质,不能拆成离子形式,故A错误;

B、NaHSO4溶液中滴入Ba(OH)2溶液至中性时的反应为:2H++SO42-+Ba2+十2OH-═BaSO4↓+2H2O,故B错误;

C、高锰酸钾能将双氧水氧化,发生氧化还原反应,即2MnO4-+5H2O2+6H+═2Mn2++5O2↑+8H2O,故C正确;

D、卤代烃在强碱的醇溶液并加热的条件下,才能发生消去反应,即C2H5Br+OH-

加热
CH2=CH2↑+Br-+H2O,故D错误.

故选C.

阅读理解
Dear Parents,
As we start the second half of the spring term, I thought it important to update you on some key developments.
Post-16 Collaboration(合作)
We have entered into an exciting new collaboration with Bassaleg Comprehension School, Duffryn High School, St Joseph’s High School, and Coleg Gwent—The Newport West Post-16 partnership. We will be working together to deliver nearly 40 different courses at other schools and likewise, students from other schools will study some subjects here. Information about the courses available to students can be found on the partnership website www. Newftartwest. corn. uk.
Uniform
I would take this opportunity to remind all parents that students are not permitted to wear non-school uniform cardigans (开襟羊毛衫) in Newport High School. It is the responsibility of parents to make sure your son or daughter wears the correct uniform to school. This includes completely black shoes. Over the next half term we will be working with students to develop a cardigan with the school logo which will provide an alternative to the current school jacket.
School Catering.
We are currently seeking a new company to provide school meals. Our new catering provider will be in place at the start of the summer term and will be working with students, parents and staff to provide improvements to our current provision. I look forward to keeping you updated on this development.
Some key dates for you to be aware of over the next half term are:
Tuesday 15March
Year 9&10 Revision Conference
Wednesday 23 March
Year 12& 13 Parents Evening (4:00—7:00 p.m.)
Thursday 31st March
Academic Review Day
Friday 1st April
Teacher Training Day (school closed to students)
Friday 15st April
End of Spring Term
Tuesday 3rd May
Start of Summer Term
Thank you for your continued support.
Your faithfully,
Karyn Keane
小题1:Karyn Keane wrote the letter on behalf of ______.
A.Bassaleg Comprehensive SchoolB.Newport High School
C.St Joesph’s High SchoolD.Duffryn High School
小题2:What can be learned about the new collaboration?
A.It involves four schools altogether.
B.Course information will be mailed to every student.
C.Students can choose as many courses as they want.
D.It allows students to learn at other schools.
小题3:When will the new catering company start working?
A.In MayB.In April C.in MarchD.In June
小题4:What do we know from the passage?
A.Students will develop a logo for the school.
B.All parents will be invited to school on 23rd March
C.Students won’t go to school on 1st April.
D.The letter was written at the start of the spring term.
问答题 简答题