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प्रश्न
Purification of crude metals by removing metallic and non-metallic impurities is known as ______ of metals.
विकल्प
smelting
roasting
refining
pulverizing
MCQ
रिक्त स्थान भरें
उत्तर
Purification of crude metals by removing metallic and non-metallic impurities is known as refining metals.
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