1) Plastic which softens on heating and hardens on cooling reversibly is known as a) Thermoelastic b) Thermoplastic c) Thermostable d) Thermosetting 2) Polyaniline is easily doped with a) reducing agent b) Alkali c) Acid  d) All 3) Which of the following is not an application for PHBV a) Bullet proof b) bottles c) containers d) drug release 4) The one dimentional nano particle is a) Nano wires b) Nano sheets c) Bulk materials d) None 5) The two dimentional nano particle is  a) Nano wires b) Nano sheets c) Bulk materials d) All 6) Which is highest conducting a) Trans - polyacetylen b) polyethylene c) cis - polyacetylene d) NONE OF THESE 7) In a polymer light emitting diode (PLED) the common material for construction of a) Mg b) carbon fibre c) Indium tin oxide d) NONE OF THESE 8) CDs, DVDs can be made from a) Polycarbonates b) PHBV c) Polypropylene d) Kevlar 9) Electroluminescence is observed because of Doping of the polymer a) Conjugated π b) Recombination of holes and electron c) Doping of the polyme d) All of these 10) In P – dopping of intricically conducting polymer polymer takes charge a) positive b) no charge c) negative d) NONE OF THESE

Engineering Themoplastics

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