Question

The solution on blue litmus turned a deep red colour in

Answer 1

the blue litmus turned a deep red colour in acidic

Answer 2

Hiiiiii friend ,
When a blue litmus turned red it means that it the solution is acidic in nature , and therefore it will not affect the red litmus . But when red litmus turns blue it means the solution is basic in nature , and the blue base will not affect blue litmus .
think it's helpful .
plz mark as brainleist ;-) ;-) ;-) ;-)