Which plastic is used for making non-stick cookware?
A. Polythene
B. Teflon
C. PVC
D. Bakelite
Answer: Option B
Solution (By JKSSB Mock Tests)
Teflon (Polytetrafluoroethylene or PTFE) is used as a non-stick coating for cookware because of its extreme chemical inertness, high heat resistance, and low friction coefficient. Polythene and PVC melt at lower temperatures, and Bakelite is a thermosetting plastic used for electrical switches.
Explanation:
Reverse osmosis (RO) uses pressure to force water through a membrane that blocks dissolved salts and impurities. Distillation uses boiling/condensation. Chlorination and ozonation are disinfection methods, not for desalination.
Explanation:
Reduction can be defined as loss of oxygen, gain of hydrogen, gain of electrons, or decrease in oxidation number. All are correct definitions.
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