Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behavior?

  • Option 1)

    Cu + 2H2SO4 \rightarrow CuSO4 + SO2 + 2H2O

  • Option 2)

    3S + 2H2SO4 \rightarrow 3SO2 + 2H2O

  • Option 3)

    C + 2H2SO4 \rightarrow CO2 + 2SO2 + 2H2O

  • Option 4)

    CaF2 + H2SO4 \rightarrow CaSO4 + 2HF

 

Answers (1)
V Vakul

As we learnt in

Redox Reaction -

Redox reaction as a class of reactions in which oxidation and reduction reactions occur simultaneously.

-

 

 CaF_{2}+H_{2}SO_{4}\rightarrow CaSO_{4}+2HF

Here the oxidation state of every atom remains the same so, it is not a redox reaction.

Correct option is 4.

 


Option 1)

Cu + 2H2SO4 \rightarrow CuSO4 + SO2 + 2H2O

Incorrect

Option 2)

3S + 2H2SO4 \rightarrow 3SO2 + 2H2O

Incorrect

Option 3)

C + 2H2SO4 \rightarrow CO2 + 2SO2 + 2H2O

Incorrect

Option 4)

CaF2 + H2SO4 \rightarrow CaSO4 + 2HF

Correct

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