Question

Which of the most basic of the following (a) Na2O (b) BaO (c) As2O3

Answer 1

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(a) { Na20

Answer 2

Answer:

Na₂O will be the most basic i.e.option(a).

Explanation:

The basicity of a compound is related to its oxidation state. The low oxidation states a substance has, the more basic it is. They are inversely proportionate to one another, in other words.

Let's take a look at each choice individually now.

(a)Na₂O

Let "Na" have the oxidation state "x." So,

$2x+(-2)=0$

$2x=+2$

$x=+1$         (1)

(b)BaO

Let "Ba" have an oxidation state of "y." So,

$y+(-2)=0$

$y=+2$          (2)

(c)As₂O₃

Let "As" have the oxidation state "z." So,

$2z+3(-2)=0$

$2z-6=0$

$2z=6$

$z=+3$       (3)

Hence, by comparing equations (1),(2), and (3) we can say that Na₂O will be the most basic i.e.option(a).

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