JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The molar mass of the water insoluble product formed from the fusion of chromite ore \(\left(\mathrm{FeCr}_2 \mathrm{O}_4\right)\) with \(\mathrm{Na}_2 \mathrm{CO}_3\) in presence of \(\mathrm{O}_2\) is _______ \(\mathrm{g} \mathrm{mol}^{-1}\).
- A 120
- B 140
- C 160
- D 180
Answer & Solution
Correct Answer
(C) 160
Step-by-step Solution
Detailed explanation
\(\mathrm{FeCr}_2 \mathrm{O}_4+\mathrm{Na}_2 \mathrm{CO}_3+\mathrm{O}_2 \rightarrow \mathrm{Na}_2 \mathrm{CrO}_4+\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO}_2\) Insoluble product will be \(\mathrm{Fe}_2 \mathrm{O}_3\) molar mass \(=56 \times 2+16 \times 3\)…
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