1.

Statement-1: [Co(NO_(2))_(6)]^(4-)" and "[Co(NO_(2))_(6)]^(3-) both complex involve d^(2)sp^(3) hybridization but former is paramagnetic and later one diamagnetic. Statement-2: In [Co(NO_(2))_(6)]^(4-) one of the 3d electrons jumps to 4d orbital making the two d-orbitals empty for d^(2)sp^(3) hybridization. NO_(2) is a stronger ligand which favours the pairing of electrons and therefore, d^(2)sp^(3) hybridization.

Answer»

Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1.
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.
Statement-1 is True, Statement-2 is FALSE.
Statement-1 is False, Statement-2 is True.

Answer :A


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