Question

what colour does the litmus paper turn in metals...plz give reason...

Answer 1

as metals are basic in nature and their oxides are also basic in nature so the red litmus paper turn into blue litmus

Answer 2

Chemical reactions other than acid-base can also cause a color change to litmus paper. For instance, chlorine gas turns blue litmus paper white – the litmus dye is bleached, because of presence of hypochlorite ions.