FeCr2O4 (chromite) is converted to Cr by following steps :<br>Chromite NaCrO4 Cr2O3 Cr<br>Reagents i — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: The froth floatation process is a highly selective method used primarily to concentrate sulfide ores. Step 2: Among the choices: Fe and Cr are typically oxide/chromite ores concentrated by gravity separation, and Al is concentrated by chemical leaching. Step 3: Copper is commonly extracted from sulfide minerals like copper pyrites (CuFeS2), which are concentrated using the froth floatation process. Thus, option (d) is correct.