Reactivity order of halogens is
Correct answer: D. HI> HBr >HCl > HF
- A. HF > HCL> HBr > HI
- B. HBr > HCl > HI
- C. HCl> HBr >HI > HF
- D. HI> HBr >HCl > HF
Explanation
The correct option is D: HI > HBr > HCl > HF. It correctly identifies iodine (I) as the most reactive halogen, followed by bromine (Br), chlorine (Cl), and fluorine (F). Iodine's large atomic size and low electronegativity make it the most reactive halogen, while fluorine, with its small atomic size and high electronegativity, is the least reactive among the halogens.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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