Question : Which of the following is used as a non-stick coating for cooking utensils?
Option 1: Perspex
Option 2: Styrofoam
Option 3: Polystyrene
Option 4: Teflon
Question : Which among the following chemicals is used to purify water as a disinfectant?
Option 1: Chlorine
Option 2: Ethanol
Option 3: Phosphor
Question : Which of the following is the first man-made plastic that is a bad conductor of heat?
Option 1: Teflon
Option 2: Polythene
Option 3: Bakelite
Option 4: Nylon
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