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Solution


Q.

What is the change in oxidation number of carbon in the following reaction           [2020]

CH4(g)+4Cl2(g)⟶CCl4(l)+4HCl(g)
1 +4 to +4  
2 0 to +4  
3 −4 to +4  
4 0 to −4  

Ans.

(3)

In CH4, oxidation number of carbon is −4 while in CCl4, oxidation number of carbon is +4. Thus, the change in oxidation number of carbon in the given reaction is from −4 to +4.