Chemistry books
Q1. Define the term ‘amorphous’. Give a few examples of amorphous solids. Ans: Amorphous solids are solids without a regular/definitive arrangement of its constituent particles (ions, atoms or molecules) and they possess something called the short-range order i.e., a regular and periodically repeating arrangement is seen only over short distances, e.g., rubber, glass. Q2. What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass? Ans: The arrangement of the constituent particles differentiates glass from quartz. The constituent particles in glass have a short-range order, but the constituent particles of quartz possess long range orders. Quartz is converted into glass by heating it and then rapidly cooling it. Q3. Classify each of the following solids as ionic, metallic, molecular, network (covalent) or amorphous. (a) Tetra phosphorus decaoxide (P 4 O 10 ) (b) Ammonium phosphate (NH 4 ) 3 PO 4 (c) SiC (d) I 2 (e) P 4 (f) ...
