UPSC Combined Geo-Scientist, Mains · 2026 · Mains Paper I
Q11(b). Stable pairs of organometallic carbonyls
Question
Find the correct pair(s) of stable organometallic compounds and rationalize the answer: (i) Ti(CO)₄, Ni(CO)₄ (ii) [Fe(CO)₆]²⁺, [Mn(CO)₆]⁺ (iii) Co(CO)₅, Fe(CO)₅ (iv) [V(CO)₆]⁻, [Co(CO)₄]⁻
Model answer
The free solution for 2026 answers the questions picked in its time plan. Question 11 is answered in full in the Book Edition of the 2026 solutions of Geo-Scientist Chemistry Paper I.
Covers18-electron ruleStable pairs of organometallic carbonyls
All parts of Question 11
- 11(a) Geiger–Müller counter10 marks
- 11(b) Stable pairs of organometallic carbonyls10 marks
- 11(c) Cristobalite and its carbon analogue10 marks