Hot conc. H2SO4 acts as a moderately strong

Question:

 Hot conc. H2SO4 acts as a moderately strong oxidising agent. It oxidises both metals and nonmetals. Which of the following element is oxidised by conc H2SO4 into two gaseous products?

(i) Cu

(ii) S

(iii) C

(iv) Zn

Solution:

Option (iii) C is the answer.

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