Q1: Acetylene should never be conveyed through __________ pipe, as it forms an unstable compound that dissociates violently at the slightest shock.

ANS:B - copper

Copper is a metal with a variety of properties that make it useful in many applications. Here are some key points about copper:

1. 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 stretched without breaking. These properties make copper highly versatile for various industrial and commercial applications.
2. Corrosion Resistance: Copper exhibits good resistance to corrosion, especially when exposed to atmospheric conditions. It forms a protective oxide layer on its surface, which helps prevent further corrosion. However, copper can corrode in certain environments, such as those containing acids or salts.
3. Electrical Conductivity: Copper is one of the best conductors of electricity among metals. Due to its high electrical conductivity, copper is widely used in electrical wiring, power generation and transmission, electronics, and telecommunications infrastructure.
4. Thermal Conductivity: Copper also has excellent thermal conductivity, making it suitable for heat exchangers, plumbing systems, and various thermal management applications.
5. Alloys: Copper is often alloyed with other metals to improve its mechanical properties or to tailor its characteristics for specific applications. Common copper alloys include brass (copper-zinc), bronze (copper-tin), and cupronickel (copper-nickel).
6. Applications: Copper is used in a wide range of applications, including electrical wiring, plumbing pipes and fittings, heat exchangers, roofing materials, coins, sculptures, and decorative items. Its antimicrobial properties also make it suitable for use in healthcare settings.