问题 实验题

某研究性学习小组欲利用下列装置进行相关气体制取的探究,请你分析并填空。

(1)写出图中仪器a、b的名称:a_______,b________。

(2)实验室制取二氧化碳的化学方程式是________________。应选择的气体发生装置是_______,气体收集装置是_______。

(3)实验室加热氯酸钾和二氧化锰制取氧气的化学方程式是_____________,应选择的发生装置是____,若用盛满水的F装置收集氧气,应从导管____(填①或②)通入。

(4)甲烷是一种无色、无味、难溶于水的气体,实验室用加热无水醋酸钠和碱石灰的固体混合物的方法制取甲烷,则实验室制取并收集甲烷应选择的装置组合是_______。

答案

⑴试管;集气瓶

⑵CaCO3+2HCl==CaCl2+H2O+CO2↑;B;D

⑶2KClO32KCl+3O2↑;A;②

⑷AC或AE

阅读理解

Lightning flashed through the darkness over Donald Lubeck’s bedroom skylight. The 80-year-old retired worker was shaken by a blast of thunder. It was 11 p.m. The storm had moved directly over his two-story wood home in the rural town of Belchertown, Massachusetts. Then he heard the smoke alarm beeping. Lubeck padded down the stairs barefoot and opened the door to the basement, and flames exploded out.

Lubeck fled back upstairs to call 911 from his bedroom, but the phone didn’t work. Lubeck realized he was trapped. “I started panicking,” he says.

His daughter and young granddaughters, who lived with him, were away for the night. No one will even know I’m home, he thought. His house was three miles off the main road and so well hidden by pines that Lubeck knew calling for help would be fruitless.

Up a hill about a third of a mile away lived Lubeck’s closest neighbors, Jeremie Wentworth and his wife. Wentworth had been lying down, listening to the radio when it occurred to him that the sound was more like a smoke detector. He jumped out of bed, grabbed a cordless phone and a flashlight, and headed down the hillside toward the noise.

He dialed 911. “Is anyone there?” he called out as he approached the house. Wentworth knew that Lubeck lived in the house.

Then he heard, “Help me! I’m trapped!” coming from the balcony off Lubeck’s bedroom.

“I ran in and yelled,‘Don, where are you?’ Then I had to run outside to catch my breath.”

After one more attempt inside the house, he gave up and circled around back. But there was no way to get to him. “I shined the flashlight into the woods next to an old shed and noticed a ladder,” says Wentworth. He dragged it over to the balcony and pulled Lubeck down just as the second floor of the house collapsed.

Wentworth and Lubeck don’t run into each other regularly, but Lubeck now knows that if he ever needs help, Wentworth will be there.

Lubeck still chokes up when he tells the story. “I was alone,” he says. “Then I heard the most beautiful sound in my life. It was Jeremie.”

小题1:According to the text, Lubeck___________.

A.stayed calm in the fire

B.couldn’t find a safe way out

C.lived on the first floor

D.called for help in the fire小题2:How did Wentworth help Lubeck escape?

A.He called 911.

B.He went upstairs and took Lubeck out.

C.He put out the fire.

D.He used a ladder and pulled Lubeck down.小题3:Which of the following factors was not mentioned in the text that almost cost Lubeck’s life?

A.He was living in his wood home alone that night.

B.The storm was too heavy and the fire was too fierce.

C.He lived far from the main road and was surrounded by pines.

D.He was too frightened to escape from the danger.小题4:What does the text mainly talk about?

A.A near neighbour is better than a distant cousin.

B.A good way to get a narrow escape.

C.God helps those who help themselves.

D.Blood is thicker than water.

单项选择题 A1/A2型题