Question

When add you water to sulphur dioxide and put a blue litmus paper in it why does it turn red?

Answer 1

$\huge\star\underline\mathtt\purple{Answer:-}$

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃

Coz sulphur dioxide is acidic.

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). Neutral litmus paper is purple.

Litmus can also be prepared as an aqueous solution that functions similarly.

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃