问题 选择题

(2011年浙江杭州, 10题)下列表中所列分子的性质和实验现象无关的是(  )

答案

答案:A

考点:

专题:结合课本知识的信息.

分析:A、利用了分子的性质:分子间有一定的间隔;糖分子和水分子相互进入它们的分子间隔去了;

B、固体碘和碘蒸气都以分子存在,而碘化钾中的“碘”以离子状态存在以及不能保持单质碘的化学性质;

C、乙醚由气体转化为液体,说明分子间有一定的间隔;

D、因为温度越高分子运动速度越快,所以温度越高水蒸发越快.

解答:解:A、糖分子和水分子相互进入它们的分子间隔去了,与“分子是可以再分的”无关,故A错误;

B、实验现象,与“分子能保持物质化学性质”有关,故B正确;

C、乙醚由气体转化为液体,与“分子间有的间隔”有关,故C正确;

D、温度越高水蒸发越快,与“温度越高分子运动速度越快”有关,故D正确.

故选A.

点评:了解利用原子和分子的性质分析和解决问题的方法;掌握分子的性质:1.分子是独立存在而保持物质化学性质的最小粒子;2.分子有一定的大小和质量;分子间有一定的间隔;分子在不停的运动;分子间有一定的作用力;分子可以构成物质,分子在化学变化中还可以被分成更小的微粒----原子;同种分子性质相同,不同种分子性质不同.

完形填空
完形填空。
     Agatha Christic would never forget the night when she met a robber (抢劫者) many years ago.
That evening,she went to a birthday party which    1    until two o'clock in the morning. Agatha
walked in the    2    street alone. Suddenly from the back of a dark    3    a tall man with a sharp knife
in his right hand ran out at her. "Good     4   , lady," the man said in a low voice. "I don't think you
wish to die here!" ''What do you want?" "Your earrings. Take them off!"
     Agatha suddenly had a    5    idea. She tried to cover her necklace with the collar (衣领) of her
overcoat while she used    6    hand to take off both of her earrings and then quickly    7    them on
the ground.
     "Take them and let me go," she said. The robber thought that the girl didn't like the earrings at all,
only trying to keep the necklace. It would cost more, so he said, "Give me your necklace."
     "Oh, sir. It doesn't    8    much. Please let me wear it."
     "I'm not that     9   .Quick!"
     With shaking    10    Agatha took off her necklace. As soon as the robber left, she picked up her
earrings and ran as fast as she could to one of her friends. The earrings cost 480 pounds and the
necklace the robber had taken away cost only six pounds.
( )1. A. ended 
( )2. A. busy  
( )3. A part   
( )4. A. morning
( )5. A. funny 
( )6. A. other 
( )7. A. handed
( )8. A. weigh  
( )9. A. afraid 
( )10. A hands 
B. stayed  
B. quiet    
B. path     
B. afternoon
B. safe     
B. others     
B. threw   
B. take     
B. angry    
B. feet     
C. stopped  
C. noisy    
C. building   
C. evening 
C. brave    
C. the other  
C. passed  
C. spend    
C. silly    
C. head     
D. lasted  
D. wide       
D. street    
D. night  
D. bright      
D. another 
D. put     
D. cost       
D. bad     
D. body     
填空题