Question

Identify the correct order of acidic strength of $C{O}_2$, CuO, CaO and $H_{2}O$.

• A. $CaO<CuO<H_{2}O<C{O}_2$
• B. $H_{2}O<CuO<CaO<C{O}_2$
• C. $CaO<H_{2}O<CuO<C{O}_2$
• D. $H_{2}O<C{O}_2<CaO<CuO$

Answer 1

The correct option is A

$CaO<CuO<H_{2}O<C{O}_2$

$C{O}_2$ is acidic oxide, $H_{2}O$ is neutral, CaO is strongly basic and CuO is weakly basic. Therefore, order of acidic strength is :

$CaO<CuO<H_{2}O<C{O}_2$