Geo-Scientist Prelims 2021 Chemistry Q38: While performing the titration between Mohr’s salt solution and…

While performing the titration between Mohr’s salt solution and potassium dichromate solution using diphenylamine as indicator, a student forgot to add o-phosphoric acid. Choose the correct answer from the following:

1. (a) The end point will be observed before the actual end point
2. (b) The end point will be observed after the actual end point
3. (c) The end point will never be observed
4. (d) The end point will be observed at its actual end point as there was no need to add o-phosphoric acid