KA140317001    高中 / 化學   

2017/01/13 20:30

redox reaction include which of the following

 

1   na2s (aq)+ pbcl2(aq)=nacl(s)+pbs(s)

2    ch4(g)+o2(g)=co2(g)+h2o(l)

3     h2(g)+o2(g)=h2o(l)

 

 

a  1 only  

b  3 only 

c  1and 2 only 

d 2and 3 only

e   1 and 2 and 3   

文字解釋  怎麼判斷oxidized and reduced   謝謝