Q. Which of the following statements are correct concerning redox properties? I Ametal M for which $E^{{^\circ}}$ for the half reaction $\ \ \ \ \ \ \ \ \ \ \ M^{n +} + \ \ {ne}^{-}\ = \ M$, is very negative will be Agood reducing agent. II The oxidizing power of the halogens decreases from chlorine to iodine. III The reducing power of hydrogen halides increases from hydrogen chloride to hydrogen iodide.
A) I , II and III
B) I and II
C) I only
D) II and III only
Explanation
(a)
$Reducing\ character\ \propto \ \frac{1}{reduction\ potentials}$
Oxidizing power of halogen decreases from $F_{2}$ to $I_{2}$ because their reduction potentials decreases from fluorine to iodine.
The reducing power of hydrogen halides increases from hydrogen chloride to hydrogen iodide since, the stability of the $H\ –\ X$ bond decreases in the same order. Hence, all statements are correct.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.