问题 填空题

(8分)A、B、C、D、E五种短周期元素的原子序数依次增大,上述元素中只有一种金属元素。A、B同周期,化合物AB2、DB2均是可使澄清石灰水变浑浊的气体。又已知C、E的单质均可溶于NaOH溶液,且C与NaOH溶液反应可产生气体。

(1)写出E元素的名称: E________

(2)画出C原子的原子结构示意图          ,写出AB2的结构式         

(3)写出DB2使澄清石灰水变浑浊的化学方程式:_____________________

(4)写出E的单质与NaOH溶液反应的离子方程式:________________________________________

答案

(1).氯   (2 )     O =" C" = O        

(3) SO2+Ca(OH)2=CaSO3↓+H2O   (4) Cl2+2OH-=Cl-+ClO-+H2O

考查原子核外电子排布规律和常见化学用语的书写。能使澄清的石灰水变混浊的气体是CO2和SO2,则A是C,B是O,D是S。能强碱反应生成气体的应是单质铝,则C是Al,E的原子序数大于S的,且可与氢氧化钠溶液反应,所以E是Cl。在CO2中碳和氧形成的是双键,所以结构式为O =" C" = O。

阅读理解

It is not clear who first fried potatoes in hot oil. However, it is widely agreed that French fries(炸薯条) were prepared as early as the 1700s in Europe. Most people believe that it was the Belgians (比利时人), instead of the French, who invented “French”fries. They think that French fries got this name from the cooking word “to french” --- to cut green beans into long thin strips (条).

When Thomas Jefferson traveled to France, he enjoyed the deep-fried potatoes very much and brought them home with him. Ever since he served French fries to his guests at a Whitehouse dinner in 1802, the dish has become very popular in America.

In the summer of 1853, an American Indian called George Crum worked as a cook at Moon Lake Lodge, a hotel in Saratoga Springs, New York. He was good at making French fries. One evening, a dinner guest found Crum’s French fries too thick and sent them back to the kitchen. Crum then cut and fried some thinner French fries, but these, too, were met with disapproval. This time, the cook got angry. So he decided to play a trick on the guest. He finally made fries that were too thin to eat with a fork. To his surprise, the guest loved the browned, paper-thin chips. The browned chips, then called Saratoga Chips, became one of the most popular dishes of the hotel. Soon they were being sold, first in local restaurants, then throughout New England.

小题1:The French fries were believed to be introduced to America in _________________________.

A.the early 1700s

B.the early1800s

C.the early 1900s

D.the summer of 1853小题2:By saying “these, too, were met with disapproval” in Paragraph 3, the author means that __________________.

A.the guest still didn’t like the dish

B.the French fries were thin enough

C.the cook prepared the chips carefully

D.the cook had met the guest’s need小题3:How were Saratoga Chips invented?

A.They were introduced by Thomas Jefferson.

B.A guest told a cook how to make the chips.

C.A cook made them only to play a trick on a guest.

D.A cook invented them in order to attract more guests.小题4:Which of the following would be the best title for the text?

A.America’s Favorite Food

B.Who Invented Saratoga Chips?

C.George Crum --- a Clever Cook

D.The History of French Fries

判断题