Question

(ii) transition metals generally form the coloured compounds.
निम्नलिखित अभिक्रियाओं को समझाइए (केवल रासायनिक समीकरण
लिखिए):
(1) ऐसिटिलीकरण
(ii) विकार्बोक्सिलीकरण
(iii) फ्रीडल-क्राफ्टस अभिक्रिया
(iv) श्मिट अभिक्रिया
(v) क्लेमनसन अपचयन
Explain the following reactions (write only chemical equations):​

Answer 1

Answer:

Most of the complex of transition elements are coloured. This is due to the absorption of radiation from visible light region to excite the electrons from its one position to another position in d-orbitals. In the presence of ligands, d-orbitals split into two sets of different orbital energies. Here transition of electron takes place and emit radiation which falls on the visible light region.