which of the following statement is not true about amorphous solids ?
(a) On heating they may become crystalline at certain temperature
(b) They may become crystalline on keeping for long time
(c) Amorphous solids can be moulded by heating
(d) They are anisotropic in nature
(d) Amorphous solids are isotropic in nature because it has no long-range order and any physical property will be the same in all direction. On the other hand. The anisotropic nature is a characteristic feature of crystalline solid.