Question

Which of the following oxides is basic in nature?

• A. ${\text{SO}}_2$
• B. ${\text{CO}}_2$
• C. ${\text{K}}_{2}O$
• D. ${\text{Cl}}_{2}O$

Answer 1

The correct option is C ${\text{K}}_{2}O$

Generally, metal oxides are basic in nature while non-metal oxides are acidic.
Hence, ${\text{K}}_{2}O$ being a metal oxide, will change the red litmus paper to blue into its aqueous solution similar to the characteristics of a basic substance.
Therefore, option 'c' i.e. ${\text{K}}_{2}O$ is the correct option.

${\text{SO}}_2$, ${\text{CO}}_2$ and ${\text{Cl}}_{2}O$ being non-metal oxides will exhibit acidic behaviour.