Question 1 : Distinguish crystalline and amorphous solid.
Question 2 : Write the principle of NMR.
Question 3 : How population difference can be increased in NMR?
Question 4 : Derive Bragg’s law.
Question 5 : What are difference types of imperfections? And explain schottky and Frenkel defect.
Question 6 : Define addition polymers and condensation polymers with example.
Question 7 : Derive an expression for the activation energy in terms of k¬1, k2, T1 and T2
Question 8 : Write two properties and application of each: polyester, polystyrene, urea formaldehyde
