When blue litmus paper dipped acids, its colour change to ____?

When blue litmus paper dipped acids, its colour change to ____?

جب نیلے لٹمس پیپر نے تیزاب کو ڈبو دیا تو اس کا رنگ ____ میں بدل جاتا ہے؟
Explanation
  • When blue litmus paper is dipped in an acid, it turns red.
  • This is because the acid changes the color of the litmus paper from blue to red.

Note: When red litmus paper is dipped in a base, it turns blue.