Match the species in Column I with the number of ions per formula unit in Column II (complete dissociation). Column I: P [Cu(NH3)4]SO4; Q K2[Ni(CN)4]; R [Co(NH3)6]Cl3; S K4[Fe(CN)6]. Column II: (1) 4 ions; (2) 2 ions; (3) 5 ions; (4) 3 ions.

JEE Main levelSingle correct optionDifficulty 2 of 3cc125

Match the species in Column I with the number of ions per formula unit in Column II (complete dissociation). Column I: P $[Cu (NH X_{3}) X_{4}] SO X_{4}$ ; Q $K X_{2} [Ni (CN) X_{4}]$ ; R $[Co (NH X_{3}) X_{6}] Cl X_{3}$ ; S $K X_{4} [Fe (CN) X_{6}]$ . Column II: (1) 4 ions; (2) 2 ions; (3) 5 ions; (4) 3 ions.

P gives

[Cu (NH X_{3}) X_{4}] X^{2 +}

and

SO X_{4} X^{2 -}

: 2 ions. Q gives

2 K X^{+}

and one anion: 3 ions. R gives one cation and

3 Cl X^{-}

: 4 ions. S gives

4 K X^{+}

and one anion: 5 ions. So P-2, Q-4, R-1, S-3.