Identify the correct order of acidic strength of $\mathrm{CO}_{2}, \mathrm{CuO}, \mathrm{CaO},…

Identify the correct order of acidic strength of $\mathrm{CO}_{2}, \mathrm{CuO}, \mathrm{CaO}, \mathrm{H}_{2} \mathrm{O}$
  1. $\mathrm{CaO} < \mathrm{CuO} < \mathrm{H}_{2} \mathrm{O} < \mathrm{CO}_{2}$
  2. $\mathrm{H}_{2} \mathrm{O} < \mathrm{CuO} < \mathrm{CaO} < \mathrm{CO}_{2}$
  3. $\mathrm{CaO} < \mathrm{H}_{2} \mathrm{O} < \mathrm{CuO} < \mathrm{CO}_{2}$
  4. $\mathrm{H}_{2} \mathrm{O} < \mathrm{CO}_{2} < \mathrm{CaO} < \mathrm{CuO}$

Solution

$\mathrm{CO}_{2} \longrightarrow$ acidic, $\mathrm{CuO} \longrightarrow$ weak base
$\mathrm{CaO} \longrightarrow$ basic, $\mathrm{H}_{2} \mathrm{O} \longrightarrow$ neutral So, correct order of acidic strength is $\mathrm{CaO} < \mathrm{CuO} < \mathrm{H}_{2} \mathrm{O} < \mathrm{CO}_{2}$ *

Asked in: JEE-TOPICTESTS-CHEMISTRY

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