Question

The non-stoichiometric compound Fe₀.94O is formed when x% of Fe²+ ions are replaced by as many (2)/(3)Fe³+ ions. The value of x is:

• A. \(18\)
• B. \(12\)
• C. \(15\)
• D. 6

Hint:

Non-stoichiometry arises due to variable oxidation states in transition metal oxides.

Answer 1

The Correct Option is A

Step 1: Let total Fe sites =100.
Step 2: x% of Fe²+ removed and replaced by (2)/(3)x of Fe³+.
Step 3: Net Fe ions present: 100-x+(2x)/(3)=100-(x)/(3)
Step 4: Given formula Fe₀.94O: 100-(x)/(3)=94 ⟹ x=18