| (I) Basic character: \[T{{l}_{2}}{{O}_{3}}>T{{l}_{2}}O>G{{a}_{2}}{{O}_{3}}>A{{l}_{2}}{{O}_{3}}\] |
| (II) Decreasing pH of aqueous solution: \[NaCl>MgC{{l}_{2}}>AlC{{l}_{3}}>PC{{l}_{5}}\] |
| (III) Lewis acid character: \[B{{F}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}\] |
| (IV) Reducing character: \[Sb{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}>N{{H}_{3}}\] |
A) \[I, II\]
B) \[II, III\]
C) \[II, \text{ }IV\]
D) \[I,\text{ }IV\]
Correct Answer: C
Solution :
[c] II and IV are CORRECT order I and III are INCORRECT order CORRECT order for I: \[T{{l}_{2}}O>T{{l}_{2}}{{O}_{3}}>G{{a}_{2}}{{O}_{3}}>A{{l}_{2}}{{O}_{3}}\] CORRECT order for III: \[BB{{r}_{3}}>BC{{l}_{3}}>B{{F}_{3}}\]
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