The suitable indicator for the titration of a strong acid and a weak base is:

The indicator used in the titration of $Na_2CO_3$ with $HCl$ is..................

For an acid indicator with $K_{in} = 1.0 \times 10^{-5}$, the color change occurs when the concentration of the indicator is $1 \times 10^{-3} \ M$. Find the $pH$ at which the color change occurs.

Methyl orange is an indicator in acid-alkali titration. It gives

Phenolphthalein is the most suitable indicator for the titration of:

The indicator used in titrating a weak acid (e.g.,oxalic acid) with a strong base (e.g.,caustic soda) solution is