Which of the following statements are correct concerning redox properties?
(i) A metal M for which `E^(@)` for the half cell reaction `M^(n+)+"ne"^(-)hArrM` is very negative will be a good reducing agent.
(ii) The oxidizing power of the halogen decreases from chlorine to iodine.
(iii) The reducing power of hydrogen halides increases from hydrogen chloride to hydrogen iodide.

Options

A. (i), (ii) and (iii)
B. (i) and (ii)
C. (i) only
D. (ii) and (iii)

Answer

A

Explanation

(i) `Mn^(n+)+n e^(-) hArr M`, for this reaction, high negative value of `E_(0)` indicates lower reduction potential, that means M will be a good reducing agent.

(ii) `{:("Element",F,Cl,Br,I),("Reduction potential",+2.87,+1.36,+1.06,+0.54),((E^(@)" volt"),,,,):}`
As reduction potential decreases from fluorine to iodine, oxidising nature also decreases from fluorine to iodine.
(iii) The size of halide ions increases from `F^(-)` to `I^(-)`. The bigger ion can loose electron easily. Hence the reducing nature increases from HF to HI.