Q41 · CSIR-NET Chemistry, June 2014

Paper: CSIR-NET June 2014 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Easy

Chromite ore on fusion with sodium carbonate gives
(a)$\mathrm{Na}_{2} \mathrm{CrO}_{4}$ and $\mathrm{Fe}_{2} \mathrm{O}_{3}$
(b)$\mathrm{Na}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ and $\mathrm{Fe}_{2} \mathrm{O}_{3}$
(c)$\mathrm{Cr_2(CO_3)_3}$ and $\mathrm{Fe(OH)_3}$
(d)$\mathrm{Na}_{2} \mathrm{CrO}_{4}$ and $\mathrm{Fe}_{2}\left(\mathrm{CO}_{3}\right)_{3}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Chromite + Na₂CO₃ + O₂ → Na₂CrO₄ + Fe₂O₃ (a).

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