Question

how to prepare indicator using beetroot

Answer 1

⇔ First juice two or three beetroots and peel off. Then make juice out of these beetroots and filter it. Then drop filter paper strip into the juice. Let it be dry.

⇔ THIS DRY FILTER PAPER ACTS AS AN INDICATOR.

Answer 2

Peel the skin of the beet root and then shred it then boil it in a vessel containing water after that allow it to cool down later strain the water and then collect it in a tray. Now dip the rectangular filter paper strips and allow it to dry.
NOW THE  pH paper is ready.