In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $$\Delta _o$$ be the highest?

Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being :

Which one of the following is the correct statement?

For a reaction $${1 \over 2}A \to 2B$$ rate of disappearance of ‘A’ is related to the rate of appearance of ‘B’ by the expression