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Chemistry Question on p -Block Elements

The correct order of reactivity of halogen is

A

F>Cl>Br>IF > Cl > Br > I

B

F<Cl<Br<IF < C l < B r < I

C

F<Cl>Br>IF < Cl > Br > I

D

F>Cl<Br<IF > Cl < Br < I

Answer

F>Cl>Br>IF > Cl > Br > I

Explanation

Solution

The order of reactivity is F> Cl> Br> IF >\, Cl > \,Br >\,I It is due to the following factors : (i) As atomic size increases the attraction for an additional electron by the nucleus becomes less. Thus, reactivity decreases. (ii) Due to decrease in electronegativity from FF to II, the bond between halogen and other elements becomes weaker and weaker. Thus, fluorides are most stable while iodides are least.