UPSC Combined Geo-Scientist, Mains · 2018 · Mains Paper I
Q5(b). Premature end point in Fe²⁺–dichromate titration
Question
What is a premature end point? Explain this with reference to ferrous and dichromate titration in acidic medium.
Model answer
The free solution for 2018 answers questions 1, 3, 4, 6, 8 and 11, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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Coverspremature end pointdichromate titrationdiphenylamine indicatorphosphoric acid
All parts of Question 5
- 5(a) Jahn–Teller effect and stabilisation energy for Cu(II)10 marks
- 5(b) Premature end point in Fe²⁺–dichromate titration10 marks
- 5(c) Basicity order of CH₃⁻, NH₂⁻, OH⁻ and F⁻10 marks