Question

when red litmus paper dipped in sample liquid it's colour changes to blue than the sample liquid is​

Answer 1

Answer:

The main use of litmus is to test whether a solution is acidic or basic. Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F).

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Answer 2

Answer:

sample liquid is basic and reason given up