The $pH$ range of methyl orange as an indicator is in between:

The pink colour of phenolphthalein in an alkaline medium is:

Which indicator works in the $pH$ range of $8 - 9.8$?

Phenolphthalein is not a suitable indicator for the titration between which of the following?

If a very small amount of $HPh$ (phenolphthalein) is added to a $0.1 \ M$ aqueous solution of $CH_3COONa$,the fraction of the indicator that exists in the colourless form is:
$[K_b(CH_3COO^{-}) = 10^{-9}, pK_a(HPh) = 9.6, \log 2 = 0.3]$

$20 \ mL$ of $0.5 \ N \ HCl$ and $35 \ mL$ of $0.1 \ N \ NaOH$ are mixed. The resulting solution will