问题 填空题

PtCl2(NH3)2可以形成两种固体,一种为淡黄色,在水中的溶解度小,另一种为黄绿色,在水中的溶解度较大,请回答下列问题:

(1)PtCl2(NH3)2是平面正方形结构,还是四面体结构_____________

(2)请在以下空格内画出这两种固体分子的几何构型图,淡黄色固体:_____________,黄绿色固体:

_____________

(3)淡黄色固体物质是由_____________分子组成,黄绿色固体物质是由_____________分子组成(填“极性分子”或“非极性分子”)

(4)黄绿色固体在水中溶解度比淡黄色固体大,原因是__________________________。

答案

(1)平面正方形

(2)

(3)非极性;极性

(4)根据相似相溶原理,因为淡黄色固体为非极性分子,所以在水中的溶解度小,而黄绿色固体为极性分子,所以在水中的溶解度大

阅读理解

Conor Grennan was unwilling to be a volunteer(志愿者). The 29-year-old American was not sure if he had the skills or a strong feeling for it.

However, he went to work at an orphanage(孤儿院) in Nepal. His first thought was to make people impressed.

"I thought that if I volunteered just once. I could retell the story over and over," Grennan said in a Huffington Post article.

However, his three-month stay it the orphanage turned into in unusual experience. It was 2004 and Grennan had given up his job to begin a year-long around-the-world trip, His first three months were spent in Nepal.

When he arrived in the village, he knew nothing about the children or the local culture. When he opened the gate of the Little Princes Children's Home, he was faced by the excited children.

The young American ended up caring for 18 children. He later discovered that they were trafficked(被拐卖的)children. So he walked through the mountains with great difficulty to find the kids' families, "I started walking with photos of the kids." he told the Reuters reporter. "I would show up in villages and show photographs around. I went with 24 photos, and I found 24 families."

At the same time, he put his heart into Nepalese culture.

Grennan said, “Volunteering is the single best way to see how the rest of the world lives.”

He also encouraged others to do what he had done. He believes that volunteering needs only making decisions to show up.

Grennan's fight against child-trafficking has changed him. His book, Little Prince, came out last week.

小题1:At first, Grennan simply wanted to _______by volunteering in Nepal.

A.write travel stories

B.learn the skills

C.help the kids there

D.impress people小题2:When Grennan came to the Little Princes Children’s Home. _______.

A.18 children were ill in bed

B.the children there felt excited

C.he decided to give up his job

D.he’d lived in Nepal for a year小题3:From the passage we can learn that Grennan _______.

A.found the kids’ families easily

B.was good at taking pictures

C.wrote the book Little Princes

D.asked others to go to Nepal小题4:Which is the best title for the passage?

A.Volunteer changes a lot

B.Volunteer is with the kids

C.Volunteer becomes a writer

D.Volunteer travels in Nepal

判断题