Question

Q.12. Define disproportionation reactions. Explain disproportionation
reaction of mangnate ions.
(2)
13 Differentiate between lanthanoid and acteloid contraction. (2)​

Answer 1

1. A disproportionation reaction is when a multiatomic species whose pertinent element has a specific oxidation state gets oxidized and reduced in two separate half-reactions, yielding two other products containing the same pertinent element.
2. Lanthanoid Contraction: The steady decrease in the atomic and ionic radii of the transition metals as the atomic number increases. ... Actinoid Contraction: The gradual decrease in the ionic radii with the increase in atomic no. is called actinoid contraction.

Please mark me as Brainliest...