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प्रश्न
Assertion (A): In smelting, roasted ore is heated with powdered coke in presence of flux.
Reason (R): Oxides are reduced to metals by C or CO. Impurities are removed as slag.
पर्याय
If both A and R are true, and R is the correct explanation of A.
If both A and R are true, but R is not the correct explanation of A.
If A is true, but R is false.
If both A and R are false.
MCQ
विधान आणि तर्क
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उत्तर
If both A and R are true, and R is the correct explanation of A.
Explanation:
The assertion is true because smelting involves heating the roasted or calcined ore to high temperatures with coke (reducing agent) and a suitable flux. The reason is also true and correctly explains the process: the coke or generated carbon monoxide (CO) chemically reduces the metal oxides into free molten metal, while the added flux reacts with any remaining rocky impurities to form an easily removable layer of molten slag.
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