The density and associated crystallinity for two polypropylene samples are as follows:

density, g/cm3	crystallinity, %
1.20	50
1.44	80

Density of totally amorphous polypropylene is

A. decreases B. increases C. remains constant D. shows no systematic variation

A. Burger vector and the dislocation line are Parallel to each other for screw dislocations B. Burger vector and the dislocation line are perpendicular to each other for edge dislocations C. Screw dislocations glide parallel to its Burger vector D. Edge dislocations glide parallel to its Burger Vector

A. 210 B. 220 C. 222 D. 310

A. 18110 B. 18300 C. 19360 D. 19890