问题 选择题

木炭与浓硫酸反应可表示为:C +2H2SO4(浓) CO2↑+2SO2↑+2H2O。

(1)该反应的反应物和生成物中,属于氧化物的是                        

(2)木炭作          (填“氧化剂”或“还原剂”),硫酸           (填“被氧化”或“被还原”)。

(3)若消耗了2mol H2SO4,则生成     mol SO2

答案

(1)CO2 SO2 H2O   (2)还原剂 被还原    (3)1

题目分析:氧化物是由氧和另一种元素组成的化合物,即氧化物的组成元素有两种,其中一种为氧元素。根据氧化物的定义可知该反应的反应物和生成物中,属于氧化物的是CO2 、SO2、H2O。(2)在反应中C的化合价由反应前单质中的0价变为反应后CO2中的+4价,化合价升高,失去电子,被氧化,作还原剂;H2SO4中的S的化合价一部分由反应前的+6价变为反应后SO2中的+4价,化合价降低,得到电子,被还原,作氧化剂,还有一部分未参加氧化还原反应,起酸的作用,提供酸根离子用来结合形成盐。每有2摩尔的浓H2SO4参加反应,产生1摩尔的SO2

阅读理解

Tony Wheeler was born to travel. His father worked for an airline. For the first 16 years of his life,Wheeler and his family lived in many different countries.

In the early 1970s,Wheeler met a young woman named Maureen. They soon married. Before getting jobs, Tony and Maureen wanted to travel. They took a year-long trip from London,through Asia,to Australia. On the trip,they visited places like India, Iran, and Afghanistan.

When Tony and Maureen arrived in Australia,people asked many questions about their trip. To answer these questions,Wheeler wrote a guidebook called Across Asia on the Cheap . The book told people about different countries' weather,customs(风俗),and places to see. But unlike travel guides in the 1970s,Wheeler’s book also talked about places most tourists did not go. He also wrote about unusual things to see and do. The book was very popular.

Wheeler and Maureen started a company called Lonely Planet. They continued travelling. They wrote guidebooks for each place they visited. Today,400 people work for Lonely Planet. The company has over 650 guidebooks. Wheeler still writes about travel “hot spots” (for example,Cambodia in Asia and Croatia in Europe). For more information,read the books!

小题1:Which trip was Tony Wheeler’s first guidebook about?

A.The United Kingdom.

B.From Asia to England.

C.From Australia to Afghanistan.

D.From England to Australia.小题2:Why did Tony Wheeler write his first guidebook?

A.He needed the money.

B.His wife asked him to do it.

C.Many people asked questions about his travels.

D.He liked writing books.小题3:How was Across Asia on the Cheap different from other travel guides?

A.It talked about places most tourists did not go .

B.It was longer and more expensive.

C.It told people about a country’s weather,customs,and places to see.

D.It was the first guidebook about Asia .小题4:Which sentence below is true?

A.Tony Wheeler still travels and writes guidebooks.

B.Tony Wheeler’s first guidebook was not popular.

C.After their first trip,Maureen did not travel with Tony .

D.Today,Lonely Planet is still a small company.

综合