What is the PH value of blue lid mass paper converted into red colour?

Dear student,

When blue litmus paper is converted into red colour, then the pH of the solution lies below 7 in the room temperature and this indicates that the solution given is acidic in nature. 

When red litmus paper is converted into blue colour, then the pH of the solution lies above 7 in the room temperature and this indicates that the solution given is basic in nature.

Regards

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