A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?
Correct answer: B. Equivalent weight of the metal is 4
- A. Atomic weight of the metal is 4
- B. Equivalent weight of the metal is 4
- C. Atomic weight of the metal is 2
- D. Equivalent weight of the metal is 8
Explanation
The oxide contains 3.15 − 1.05 = 2.10 g oxygen. Using 8 g oxygen per equivalent, the metal equivalent weight is 1.05 × 8/2.10 = 4; its atomic weight cannot be determined without knowing the valency.
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