question_answer

Out of the following ions,

(i) \[L{{i}^{\oplus }},\]

(ii) \[M{{g}^{2+}},\]

(iii) \[A{{l}^{+3}},\]

(iv) \[C{{u}^{\oplus }},\]

(v) \[C{{d}^{2+}},\]

(vi) \[P{{t}^{4+}},\]

(vii) \[\overset{\bigcirc -}{\mathop{O}}\,H,\]

(viii) \[N{{O}_{3}}^{\bigcirc -},\]

(ix) \[C{{O}_{3}}^{2-},\]

(x) \[{{H}^{\bigcirc -}}\]

(xi) \[{{I}^{\bigcirc -}},\]

(xii) \[C{{N}^{\bigcirc -}},\]

The total numbers of hard acids and soft acids are, respectively,

A) 3, 2                     

B)        3, 3                    

C) 4, 3                     

D)        4, 4

Correct Answer: B

Solution :

[b] Hard bases : Hard acids : \[L{{i}^{\oplus }},\,M{{g}^{2+}},A{{l}^{+3}}]=3\] Soft bases : Soft acids:  \[C{{u}^{\oplus }},C{{d}^{2+}},P{{t}^{4+}}]=3\]