问题 填空题

已知酸性条件下有以下反应关系:

①KBrO3能将KI氧化成I2或KIO3,其本身被还原为Br2

②Br2能将I-氧化为I2

③KIO3能将I-氧化为I2,也能将Br-氧化为Br2,其本身被还原为I2

(1)氧化剂(Br2、KBrO3、KIO3)氧化能力由强到弱的顺序为____。

(2)现向含有1 mol KI的硫酸溶液中加入含amol KBrO3的溶液,a的取值不同,所得产物也不同。试将讨论的结果填入下表中: 

(3)若产物中碘单质和溴单质的物质的量相等时,a的值为____。

答案

(1)KBrO3>KIO3>Br2

(2)A.

B、I2 、Br-.Br2 、H2O

D.

E ;IO3-、Br2、H2O

(3)

阅读理解

A study of a university in Shanghai had found that many of the students there are using a quote(引语)from the Italian poet Dante as a kind of motto.The study of Fudan University, one of China’s top universities, of 489 students, found that 82 had chosen Dante’s “Follow your own path and don’t worry about what others say” as their motto, out of 278 people who said they had a motto.This was followed by “Believe yourself” and “Self-improvement without stop.”

Students also expressed a common hope for greater understanding and care and said they were always ready to give a hand to those in need.

Some researchers think that mottoes can play an important part in children’s growth and they say that a good motto can help children develop a better character.

小题1:The study shows _________.

A.which university should have mottoes

B.what poems are popular

C.how many students like the motto “Believe yourself.”

D.the majority of the students like to choose their favorite mottoes小题2:Of the students asked, _______ students have mottoes.

A.about 78%

B.about 57%

C.about 16%

D.about 8%小题3:The motto “Self-improvement without stop” shares the similar meaning with ______.

A.going on to improve rapidly

B.growing by oneself continuously

C.making oneself better and perfect continuously

D.becoming better without having a break小题4:The best title for the passage should be _______.

A.Mottoes and Character Developing

B.Students and Poet

C.Mottoes and Learning

D.Understanding Care

单项选择题 A1/A2型题