Group IV transition elements, viz, Ti (22), Zr (40) and Hf (72). These are the metals of higher melting point. If heated these metals react directly with the nonmetals, particularly with oxygen, hydrogen and in the case titanium with nitrogen also. The most stable oxidation state is +4. The lower oxidation states are not known for Zr and Hf. Even for titanium they are easily oxidised to +4 state. Because of the almost equal atomic radii Zr and Hf behave similarly. The hydrated oxide of Titanium TiO 2 , nH 2 O is precipitated along with Fe(OH) 3 in group III
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
(i)
Sol. TiO 2 ,nH 2 O + H 2 O 2 ⎯→ H 2 TiO 4 + nH 2 O
(Yellow subs)
(ii)
Sol. Ti 4+ is a hard Lewis acid therefore it form stable complex with hard Lewis base, F – .
(iii)
Sol. The structure of ZrO 3 is 
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