Question

Which one of the following is most basic.

• A. $Al_{2}O_{3}$
• B. $MgO$
• C. $SiO_{2}$
• D. $P_{2}O_{5}$

Answer 1

Answer: (B)

$MgO$

Answer 2

$\underbrace { \mathrm { MgO } } _ { \text {Basic } } \underbrace { \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } } _ { \text {Amphoteric } } \underbrace { \mathrm { SiO } _ { 2 } \quad \mathrm { P } _ { 2 } \mathrm { O } _ { 5 } } _ { \text {Acidic } }$

$MgO + H_{2}O \rightarrow Mg(OH)_{2}$ Base or alkali.