Which one of the following statements is false?1. During roasting, moisture is removed from the ore2. The ore is freed from almost all non- metallic impurities.3. Calcination of ore is carried out in the absence of any blast of air.4. The concentrated zinc blende is subjected in calcination during its extraction by purometallurgy.

Which one of the following statements is false?1. During roasting, moi

1.	Which one of the following statements is false?1. During roasting, moisture is removed from the ore2. The ore is freed from almost all non- metallic impurities.3. Calcination of ore is carried out in the absence of any blast of air.4. The concentrated zinc blende is subjected in calcination during its extraction by purometallurgy.
Answer» Option 1. Because, for rusting, moisture is an essential factor.