IIT-JEE Exam

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are
(A) II, III in haematite and III in magnetite (B) II, III in haematite and II in magnetite
(C) II in haematite and II, III in magnetite (D) III in haematite and II, III in magnetite

Read Solution (Total 0)

IIT-JEE Other Question

The freezing point (in oC) of a solution containing 0.1 g of K3[Fe(CN)6 (Mol. Wt. 329) in 100 g of water
(Kf = 1.86 K kg mol-1) is Among the following complexes (K-P)
K3[Fe(CN)6] (K), [Co(NH3)6]Cl3 (L), Na3[Co(oxalate)3] (M), [Ni(H2O)6]Cl2 (N), K2[Pt(CN)4] (O) and
[Zn(H2O)6](NO3)2 (P)
(A) K, L, M, N (B) K, M, O, P
(C) L, M, O, P (D) L, M, N, O