Multiple choice

Which of the following statements is/are correct? P. Carborundum is used as a refractory material. Q. Blast furnace is used for the smelting of lead ore. R. Calamine and zincite are the ore of zinc.

  1. P and Q

  2. Q and R

  3. P and R

  4. All are the correct statements

  5. Only P
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The substances which 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) and zincite (ZnO) are the ore of zinc.

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