Question

what happen when a blue and red litmus are added to lemon juice and soap solution

Answer 1

blue limus turn red in lemon juice ( acidic)
while red litmus turn blue in soap solution. (basic)

Hope this helps you

Answer 2

lemon is acidic so the blue litmus will turn red. ...and the red litmus will remain same. ...
while the soap is basic so red litmus will turn into blue and blue litmus will remain same