Question

An oxide of a metal shows no action with blue-litmus but turn red litmus to blue in its aqueous solution. the possible formula of the metal oxide can be

CO2
SO2
MgO
H2O​

Answer 1

Answer:

Co2

Explanation:

Answer 2

The metal oxide which turns red litmus to blue is magnesium oxide (c) MgO.

• The first option is carbon dioxide is a gas that does not have a pH and thus does not show any change in the litmus paper.
• The second option is sulphur dioxide, which is slightly acidic in nature and will turn blue litmus to red.
• The fourth option is water and is neutral in nature which will not show any change in litmus paper.
• The third option is magnesium oxide, which is basic in nature as it is a fact that any metal oxide is basic in nature and thus will change red litmus to blue.