Question

The order in which the following oxides are arranged according to decreasing basic nature is.

• A. $Na_{2}O,MgO,Al_{2}O_{3},CuO$
• B. $MgO,Al_{2}O_{3},CuO,Na_{2}O$
• C. $Al_{2}O_{3},MgO,CuO,Na_{2}O$
• D. $CuO,Na_{2}O,MgO,Al_{2}O_{3}$

Answer 1

Answer: (A)

$Na_{2}O,MgO,Al_{2}O_{3},CuO$

Answer 2

$Na_{2}O,MgO,Al_{2}O_{3},CuO$. More the metallic character higher the $e^{-}$ donating tendency. Therefore lower the I.E. more the basic nature of oxide.