Boyle's law relates which two variables at constant temperature? MCQ with Answer and Explanation

Explanation:
Teflon (PTFE) is an addition polymer of tetrafluoroethene (CF₂=CF₂). The polymer has a linear chain of –CF₂–CF₂– units with high C–F bond strength, making it chemically inert and heat resistant. PVC is polymer of vinyl chloride (CH₂=CHCl). Polyethylene comes from ethylene. Polystyrene from styrene. Teflon is used for non-stick coatings, electrical insulation, and chemical containers.

Explanation:
Steel is an alloy of iron with controlled amounts of carbon (0.02-2.1%) and often other elements like manganese, chromium, nickel, etc. Cast iron contains 2-4% carbon. In steelmaking (Bessemer, LD process), impurities like excess carbon, silicon, manganese, sulfur, phosphorus are oxidized and removed, then desired carbon and alloying elements are added to achieve specific properties.

Explanation:
Graham's law: r ∝ 1/√M (molar mass). At same T,P, rate inversely proportional to square root of density. Lighter gases diffuse faster. Used in uranium enrichment (UF₆).