Question

Which of the following is the correct order of gradually decreasing basic nature of the oxides.

• A. $Al_{2}O_{3}$, $MgO$, $Cl_{2}O_{7}$, $SO_{3}$
• B. $MgO$, $Al_{2}O_{3}$, $SO_{3}$, $Cl_{2}O_{7}$
• C. $Cl_{2}O_{7}$, $SO_{3}$, $Al_{2}O_{3}$, $MgO$
• D. $SO_{3}$, $Cl_{2}O_{7}$, $MgO$, $Al_{2}O_{3}$

Answer 1

Answer: (B)

$MgO$, $Al_{2}O_{3}$, $SO_{3}$, $Cl_{2}O_{7}$

Answer 2

Across the period non-metallic character increases. Hence basic nature of oxide decreases.