Question

what wiil be the to to aquired by a basic solution in few drops of methyl orange indicator are added to it.

Answer 1

The pKa value of methyl orange, or around the pH where the color changes between yellow and red, is 3.4. Above pH 3.4, methyl orange indicates with a yellow color. Below pH 3.4, methyl orange indicates with a red color. Around the range 2.4–4.4, it will indicate with a somewhat orange color, as it is in the middle of a red and yellow color.

NaOH is a strong base. Any solution of NaOH will have a pH greater than 7. This is far above the pKa of methyl orange. Thus, methyl orange will indicate yellow in NaOH.