UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper I

Q10(a). Preparation of sodium borohydride

5 marks
Topic: Outside the listed units
Question only

Question

How is sodium borohydride prepared?

Model answer

The free solution for 2019 answers questions 1, 2, 4, 6, 9 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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Coverssodium borohydrideNaBH4Schlesinger processNaH and B(OMe)3

All parts of Question 10

10(a) Preparation of sodium borohydride5 marks
10(b) Selection rules; weak broad d–d bands10 marks
10(c) Silicate units and pyro-, cyclic and chain silicates15 marks