Q1: Chalcopyrite is an ore of

ANS:C - copper

Physical Properties: Copper is a reddish-brown metal with excellent electrical and thermal conductivity. It is malleable and ductile, meaning it can be easily shaped and drawn into wires. Copper's conductivity makes it essential in electrical wiring and electronics.

1. Chemical Properties: Copper is a relatively stable metal, resistant to corrosion in most environments. It forms a protective oxide layer on its surface, which prevents further oxidation, making it suitable for outdoor applications and in harsh conditions.
2. Industrial Applications:
   • Electrical Wiring: Copper is widely used in electrical wiring and transmission lines due to its high conductivity. It is the preferred material for conducting electricity efficiently with minimal energy loss.
   • Electronics: Copper is used extensively in electronics, such as printed circuit boards (PCBs), connectors, and integrated circuits, due to its conductivity and reliability.
   • Construction: Copper is used in plumbing, roofing, and architectural applications due to its corrosion resistance and durability. It is also used in heating and cooling systems.
   • Transportation: Copper is used in the automotive industry for radiators, brakes, and wiring harnesses. It is also used in marine applications for boat building and ship components.
   • Industrial Machinery: Copper is used in various industrial machinery and equipment, including motors, generators, and transformers, due to its electrical and thermal properties.
   • Coinage and Currency: Copper has been used for centuries in coins and currency due to its durability and intrinsic value.
3. Alloys: Copper is often alloyed with other metals to enhance its properties. Common copper alloys include brass (copper and zinc), bronze (copper and tin), and cupronickel (copper and nickel), each with unique properties suited for different applications.
4. Health and Environment: Copper is an essential trace element for humans and plays a vital role in various biological processes. It is also recyclable, making it environmentally friendly and cost-effective. Copper's antimicrobial properties are exploited in applications such as healthcare settings and touch surfaces.