COMEDK · Chemistry · 9. Redox Reactions
The equivalent weight of a certain trivalent element is \(20\). Molecular weight of its oxide is
- A \(152\)
- B \(56\)
- C \(168\)
- D \(68\)
Answer & Solution
Correct Answer
(C) \(168\)
Step-by-step Solution
Detailed explanation
Equivalent weight \(=\frac{\text { molecular weight }}{\text { valence factor }}\) \(\therefore\) Molecular weight \(=20 \times 3=60\) It's oxide is \(\mathrm{M}_{2} \mathrm{O}_{3}\) and molecular weight \[ =2 \times 60+16 \times 3=120+48=168 \]
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