Question

Which of the following reaction is a combination reaction?

(a) X + YZ → XZ + Z

(b) 2F2 + 2OH^– → 2F^– + OF2 + H2O

(c) 2NaH → 2Na + H2

(d) S + O2 → SO2

The question was posed to me in class test.

I need to ask this question from Redox Reactions and Electrode Processes topic in section Redox Reactions of Chemistry – Class 11

Answer 1

Correct option is (d) S + O2 → SO2

The explanation is: Only the reaction; S + O2 → SO2 is a chemical combination reaction, whereas X + YZ → XZ + Z and 2F2 + 2OH^– → 2F^– + OF2 + H2O are disproportionation reactions and 2NaH → 2Na + H2 is a chemical decomposition reaction.