Question

What happens if litmus paper is dipped in MgO

Answer 1

Assuming that the MgO has some solubility associated with it. The O2- ion will accept a proton from a water molecule to produce OH-. Therefore, now having some basicity associated with the solution, providing red litmus paper is added to the solution it will change to a blue colour.

Answer 2

The litmus color changes to Blue in basic solution as MGo is basic oxide cuz metals always forms basic oxides

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