MCQOPTIONS
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				| 1. | 
                                    One of the properties of glass is its transparency. This property of glass is due to | 
                            
| A. | its high viscosity. | 
| B. | regular arrangement of silicate units in glass. | 
| C. | irregular arrangement of silicate units in glass. | 
| D. | its high coefficient of thermal expansion. | 
| Answer» D. its high coefficient of thermal expansion. | |