The property of hydrides of \( \mathrm{p} \)-block elements mostly ...
0The property of hydrides of \( \mathrm{p} \)-block elements mostly depends on :
(i) electronegativity difference between central atom
\( \mathrm{P} \) and hydrogen
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(ii) size of central atom
(iii) number of valence electrons in central atom
Some undergo hydrolysis in which central atom is less electronegative, react with \( \mathrm{OH}^{-} \)to give hydrogen.
While acidic property of hydride in a period depends
on electronegativity of central atoms, i.e. more
electronegative is the atom, more acidic is hydride. In a
group, acidic property is proportional to size of central
atom. Some electron deficient hydride behaves as Lesvis
acid while only one hydride of an element in p-block
behaves as Lewis base with lone pair of electrons.
Hydrides in which central atom's electronegativity is
close to hydrogen has no reaction with water.
Which one is the weakest acid among the following ?
(A) \( \mathrm{HF} \)
(B) \( \mathrm{HCl} \)
(C) \( \mathrm{HBr} \)
(D) \( \mathrm{HI} \)
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