MCQ
Compound having highest oxidation state of central atom act as acid lowest one act as basic and intermediete $O.S.$ act as amphoteric. Which one of the following is amphoteric
- ✓$HOCl$
- B$HClO_2$
- C$HClO_4$
- DNone
✓
Answer
Correct option: A.
$HOCl$
a
$(a)$ $1 s ^{2} 2 s ^{2} \rightarrow Be$
$(a)$ $1 s ^{2} 2 s ^{2} \rightarrow Be$
$(b)$ $1 s ^{2} 2 s ^{2} 2 p ^{4} \rightarrow O$
$(c)$ $1 s ^{2} 2 s ^{2} 2 p ^{3} \rightarrow N$
$(d)$ $1 s ^{2} 2 s ^{2} 2 p ^{1} \rightarrow B$
The ionization enthalpy order is $B < Be < O < N$
Be has more IE compared to $B$ due to extra stability and $N$ has more $IE$ compared to oxygen due to extra stability
Hence, $N \rightarrow 1402 kJ / mol$
$O \rightarrow 1314 kJ / mol$
$B \rightarrow 801 kJ / mol$
$Be \rightarrow 899 kJ / mol$
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