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3 Answer(s)
Lalit Patel
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Posted 5 year ago Lalit Patel

When in contact with base

Mohammad Modassir Mushtaque
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Posted 5 year ago Mohammad Modassir Mushtaque

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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