Q. Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behavior?
A) $Cu + 2H_2SO_4 \rightarrow CuSO_4 + SO_2 + 2H_2O$
B) $3S + 2H_2SO_4 \rightarrow 3SO_2 + 2H_2O$
C) $C + 2H_2SO_4 \rightarrow CO_2 + 2SO_2 + 2H_2O$
D) $CaF_2 + H_2SO_4 \rightarrow CaSO_4 + 2HF$
Explanation
[Solution] In (4) no oxidation state changes; $H_2SO_4$ acts only as an acid. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.