The $pH$ range of methyl red indicator is .......?

For an acid-base indicator,the dissociation constant $K_a = 1.0 \times 10^{-5}$. The indicator is red in acidic form and blue in basic form. What is the $pH$ range required for the color change from $80\%$ red to $80\%$ blue?

The best indicator for the detection of the end point in the titration of a strong acid and a weak base is:

Methyl orange gives $.......$ color in an acidic medium.

The pink colour of phenolphthalein in an alkaline medium is:

Which indicator can be used in the titration of a strong acid and a strong base?