Multiple choice

Which of the following statements is/are correct? A. The Silicon carbide is used as a refractory material. B. Blast furnace is used for the smelting of lead ore. C. Calamine and casseterite are the ores of zinc.

  1. Only A

  2. Only B

  3. Only C

  4. Only A and B

  5. Only B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The substances that are capable of withstanding very high temperatures without melting or becoming soft are called refractory materials like- SiC (carborundum), Al2O3, SiO2, etc. Blast furnace is used or the smelting of iron, copper and lead ores. Calamine (ZnCO3) is the ore of zinc while casseterite (SnO2) is the ore of Sn.

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