JEE Main 2009 Chemistry question

In context with the transition elements, which of the following statements is incorrect?

(1)In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.
(2)In the highest oxidation states, the transition metal show basic character and form cationic complexes.Correct
(3)In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d electrons are used for bonding.
(4)Once the configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.

Answer: (2)

Solution

In their highest oxidation states, transition metals form acidic oxides and oxo-anions (e.g. ,

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Question ID VK-039162