Salt (X) gives white ppt. with BaCl2 which is insoluble in conc. HNO3 and conc.HCl. Salt (X) on reaction with NaOH in presence of H2O2 gives green solution (Y) which on acidification turns into purple coloured compound (Z).
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The ratio of p bonds in compound (Y) and (Z) respectively is

Compound (Y) is

Y =
= d1 (paramagnetic with 1 unpaired electron)
Anions of compounds X, Y and Z are :
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