p-Block elementsHard
Question
Which is / are true statement(s) ?
Options
A.Basic nature of X- is in order F- > Cl- > Br- > I-
B.HI is strongest acid of HF, HCl, HBr and HI
C.The ionic character of M − X bond decreases in the order M − F > M − Cl > M − Br > M − I
D.Among F, Cl, Br and I, F has the highest enthalpy of hydration.
Solution
(A) Order is I- > Br- > Cl- > F- ; ease of donation of lone pair of electrons increases with increase in size of ions.
(B) HI is strongest acid on account of lowest bond dissociation energy.
(C) According to Fajans rule smaller anion has smaller polarisability and thus less covalent character but more ionic character.
(D) ᐃHHydration ∞
(B) HI is strongest acid on account of lowest bond dissociation energy.
(C) According to Fajans rule smaller anion has smaller polarisability and thus less covalent character but more ionic character.
(D) ᐃHHydration ∞
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