COMEDK2023Evening ShiftChemistryd and f Block ElementsActual
Match the following characteristics of transition metals given in Column I with the examples listed in Column II S.No. Characteristic properties S.No. Examples W Chemically inert, non-stoichiometric compound A WO₃ X Higher oxidation states are more stable B TiCl₄ Y Due to inert pair effect, lower oxidation state is more stable C Mn₄N Z Colourless compound of transition metal D SnCl₂
Options
- AW = C X = A Y = D Z = B
- BW = C X = D Y = A Z = B
- CW = A X = D Y = C Z = B
- DW = B X = C Y = D Z = A
Correct answer
A. W = C X = A Y = D Z = B
Step-by-step solution
W: Chemically inert, non-stoichiometric compound. Interstitial compounds like Mn₄N are non-stoichiometric and often chemically inert. Thus, W matches with C. X: Higher oxidation states are more stable. In the case of WO₃ , tungsten is in its highest oxidation state of +6 , which is the most stable state for group 6 elements. Thus, X matches with A. Y: Due to inert pair effect, lower oxidation state is more stable. SnCl₂ involves tin, which is a post-transition element where the inert pair effect makes the +2 state