UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper III

Q3(d). Moisture by Karl Fischer reagent

10 marks
Topic: Analysis of geological materials
Question only

Question

How will you determine moisture content in a sample using Karl Fischer reagent? Describe the reactions involved in the method suggested.

Model answer

The free solution for 2020 answers questions 1, 2, 4, 6, 8 and 10, 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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CoversKarl Fischer titrationmoisture determinationiodine sulphur dioxidewater content

All parts of Question 3

3(a) Thermogravimetry of Ca, Ba and Sr oxalate monohydrates10 marks
3(b) Temperature and pressure programming in GC5 marks
3(c) Why plasma sources are preferred over flames5 marks
3(d) Moisture by Karl Fischer reagent10 marks