Question

why the blue Litmus Paper turns into red?​

Answer 1

$\huge\red{\boxed{\bold{Answer}}}$

Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic (i.e. alkaline) conditions.

The pigment in blue litmus reacts with H+ ions and changes chemically so the bonds are 'tuned' to reflect a longer wavelength of light to appear red to our eyes.

$\huge\mathbb\blue{THANK\:YUH!}$

Answer 2

Answer:

blue litmus turns to red litmus