Question

Polymer used in bullet proof glass is:
A. lexan
B. PMMA
C. nomex
D. kevlar.

Answer 1

Hint: Lexan is the most popular polymer which is used for manufacturing different things due to its strong and rigid nature.

Complete step by step answer:
To answer this question, at first, we have to know the definition of polymer and which polymer is used in bullet proof glass. Thermoplastic polymers are a kind of polymer that liquefy whilst heated and harden whilst cooled, a method that is absolutely reversible and might be repeated. Polycarbonate has an ideal application in bulletproof glass, in that it has a totally excessive strength, and is additionally optically transparent.
Now lets us find the solution from given options -
Lexan is a type of polycarbonate i.e., thermosetting polymers composed of carbonate groups. They are hard and are observably transparent. This is the reason why a laminated polycarbonate (Lexan) is used to make bulletproof glass.
Polymethylmethacrylate (PMMA), is a synthetic glue produced from the methyl methacrylate polymerization. A transparent and inflexible plastic, PMMA is often used as an alternative for glass in products including shatterproof windows, skylights, illuminated signs, and plane canopies.
Nomex is well known as a barrier to fire and heat. Apart from race-automobile drivers, it is worn through astronauts, fire-fighters. It is additionally used in many mundane ways, including in my family oven gloves.
Kevlar is a form of aramid fiber. It is woven into textile substances and is extraordinarily hard and lightweight, with resistance toward corrosion and heat. It is used in many purposes including aerospace engineering (including the structure of the plane), bulletproof vests, automobile brakes, and boats.

Thus, the right answer is option A. i.e. lexan

Note:
 Faraday’s law of electrolysis states that the mass of a substance liberated or deposited in an electrode is directly proportional to the quantity of charge passed. The mathematical representation of this is $w \propto Q$, where w is mass deposited and Q is charge.