Question

Which oxide is more basic?

• A. ${Na}_{2}O$
• B. $MgO$
• C. ${SiO}_2$
• D. ${Al}_2{O}_3$

Answer 1

The correct option is A

${\mathrm{Na}}_2\mathrm{O}$

Explanation for the correct option:

The oxides of elements across a period changes from strongly basic to strongly acidic. Among the given options, since Sodium ($\mathrm{Na}$) is at extreme left its oxide is more basic.

Explanation for the incorrect option:

Magnesium oxide ($\mathrm{MgO}$) is less basic compared to Sodium oxide (${\mathrm{Na}}_2\mathrm{O}$).

Aluminium oxide (${\mathrm{Al}}_2{\mathrm{O}}_3$) is amphoteric in character.

Silicon oxide (${\mathrm{SiO}}_2$) is less acidic in nature.

Final answer:

Hence, option (A) is the correct option.