When Fe 0 . 93 O is heated in presence of oxygen, it converts to Fe 2 O 3 . The number of correct statement/s from the following is ______ . A. The equivalent weight of Fe 0 . 93 O is Molecular weight 0 . 79 B. The number of moles of Fe 2 + and Fe 3 + in 1 mole of Fe 0 . 93 O is 0 . 79 and 0 . 14 respectively. C. Fe 0 . 93 O is metal deficient with lattice comprising of cubic closed packed arrangement of O 2 - ions.

Step-by-step solution

A : Fe 0 . 93 O → Fe 2 O 3 The valence factor of Fe 0 . 93 O , nf = 3 - 200 93 × 0 . 93 nf = 0 . 79 Hence, the equivalent weight = Molecular   weight 0 . 79 B : 2 x + 0 . 93 - x × 3 = 2 x = 0 . 79 Fe 2 + = 0 . 79 , Fe 3 + = 0 . 14 C : In Fe 0 . 93 O , O 2 - ions forms the lattice and iron ions occupies the voids in the lattice. As sufficient number of irons are not available, this metal oxide is said to be metal difficient. D :   % Fe 2 + = 0 . 79 0 . 93 × 100 = 85 % ; Fe 3 + = 15 %