Elements or compounds occurring naturally in the earth’s crust are called minerals, and those with high metal content suitable for profitable extraction are referred to as ores.
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Gold, silver, platinum, and copper are found in the free state. Copper and silver are also found in the combined state as sulphide or oxide ores.
“Mahabharata” is an ancient Indian epic, a sprawling narrative of moral dilemmas, family conflicts, and divine teachings. It encompasses the Kurukshetra War and includes the Bhagavad Gita, offering profound insights into ethics, duty, and the nature of existence.
Metals at the top of the activity series are highly reactive and are never found in nature as free elements. Moderately reactive metals (Zn, Fe, Pb, etc.) are found mainly as oxides, sulphides, or carbonates in the earth’s crust.
Moderately reactive metals in the middle of the activity series include iron, zinc, lead, and copper. They are typically present as sulphides or carbonates in nature.