Which polymer is used to make non-stick kitchen utensils?
A. Nylon
B. Polyethylene
C. Teflon
D. Polystyrene
Answer: Option C
Solution (By JKExamLibrary)
Teflon (PTFE) has a very low coefficient of friction and high heat resistance, making it ideal for non-stick coatings. Polystyrene is used in packaging, polyethylene in plastic bags, nylon in textiles and ropes. Teflon's monomer is tetrafluoroethene.
Explanation:
Boyle's law: PV = constant (at fixed T and n). So P ∝ 1/V. If volume is doubled, pressure halves. Charles' law relates V and T; Graham's law relates diffusion rate to molar mass.
Explanation:
Copper pyrites (CuFeS₂) is a sulfide ore, concentrated by froth flotation using pine oil and water. Then roasting, smelting, and refining.
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