Ответы на вопрос:
1)ch4+cl2=ch3cl+hcl
2ch3cl+2na=c2h6+2nacl
c2h6+br2=c2h5br+hbr
c2h5br+naoh=c2h4+nabr+h2o
c2h4+cl2=c2h4cl2
c2h4cl2+2naoh=c2h2+2nacl+2h2o
c2h2+ch3cl=c3h4+hcl
2)c2h4+cl2=c2h4cl2
c2h4cl2+2koh=c2h2+2kcl+2h2o
3c2h2=c6h6
c6h6+ch3cl=c6h5-ch3+hcl
5c6h5-ch3+6kmno4+9h2so4=5c6h5-cooh+6mnso4+3k2so4+14h2o
3)2ch4=c2h2+3h2
3c2h2=c6h6
c6h6+br2=c6h5br+hbr
c6h5br+2na+ch3br=c6h5-ch3+2nabr
c6h5-ch3+ho-no2= c6h4(no2)-ch3+h2o.
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