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Classify the following solids into amorp...

Classify the following solids into amorphous or crystalline solids.
Bakelite, Platinum , Camphor , Oxalic acid , Melamine formaldehyde, Alum , Neoprene, Sugar , Solid `CO_2` , Polythene.

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(i)Crystalline : Platinum, camphor , oxalic acid , alum , sugar , solid `CO_2`
(ii)Amorphous : Bakelite, melamine , formaldehyde, neoprene , polythene
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