问题 选择题

某些化学反应可用下式表示 :A + B ─→ C + D + H2O 请回答下列问题:

(1)若A、C、D均含有氯元素,且A的化合价介于C与D之间,

写出该反应的离子方程式:                                 

(2)若C为氯化钠,D能使澄清石灰水变浑浊的无味气体,则A与B的组合是:         

(3)若A为红色金属单质,B为第二周期某种元素的最高价氧化物的水化物,

(Ⅰ)当C为无色气体时,相应的化学方程式为                       

(Ⅱ)当C为红棕色气体时,氧化剂与还原剂的物质的量之比为          

每生成标准状况下11.2L的该气体,转移电子的数目约为            

(4)若C、D均为气体且都能使澄清石灰水变浑浊,则A与B的组合是          

(5)当C为可以使湿润的红色石蕊试纸变蓝的气体时,实验室进行该气体的尾气处理,  应选用下列            装置(填序号)

答案

(5)   b

完形填空
完形填空。
     Today the problem of environment has become more and more serious. Every day, every hour, the air,
forests, soil, oceans and fresh    1     are becoming dirtier and dirtier. There are two     2     for the problem: the excessive (过度) use of natural resources and pouring a lot of     3     waste in the course of production. 
     Yet, man    4     great progress in environmental protection. Scientists and inventors are trying to
develop    5      engines for automobiles. Governments of many countries have made    6     to protect the
natural resources. More and more people have realized the importance of environmental protection and are doing what they can to protect our surroundings.
     Still more ways     7     to solve the problem. People should be educated in       8      modern methods to protect the environment and learn to make clever use of recycling our natural resources. The government of all       9       should take ways to fight against pollution _    10   _ protecting the environment is not only
protecting our home but also the civilization (文明) of the humankind.
( ) 1. A. water      
( ) 2. A. ways      
( ) 3. A. pollution  
( ) 4. A. makes      
( ) 5. A. cleaner    
( ) 6. A. ways      
( ) 7. A. should take
( ) 8. A. using      
( ) 9. A. schools    
( ) 10. A. so        
B. air      
B. reasons  
B. polluted
B. made    
B. dirtier  
B. laws    
B. taking  
B. taking  
B. cities  
B. because  
C. food          
C. things        
C. polluting      
C.  has made      
C. Worse          
C. rules          
C. should be taken
C. having        
C. countries      
C. because of    
单项选择题 A3/A4型题