What will you observe when :(a) a drop of sodium hydroxide is added to blue litmus? (b) a drop of hydrochloric acid is added to China rose indicator? (c) a drop of dilute sulphuric acid is added to red -cabbage juice?
Answers
Answer:
a) remains same, b) turns magenta or red c) turns pink
Explanation:
a) when you add a base to blue litmus it remains same as base turns litmus paper blue
since NaOH (sodium hydroxide is a base no reaction takes place)
b) when you add an acid to china rose indicator it turns magenta or red
since HCl or Hydrochloric acid is acidic in nature china rose indicator will turn into red or magenta colour
c)
Featured snippet from the web
In this case, when dilute sulfuric acid is introduced with red cabbage, there is a pink color produced. Red cabbage juice has a pigment in it which is water soluble. This pigment is called anthocyanin and the basic property of it is that it changes its color the moment it gets mixed with an acid or a base
hope this is helpful
Answer
a. the solution turns red
b. the solution will turn magenta or dark pink
c. the solution turns pink (I am not sure about this answer)