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Pick out the wrong statement. | |
A. | Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate. [Wrong Answer] |
B. | Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide. [Wrong Answer] |
C. | Ordinary glass is represented chemically by Na2O . CaO . 6SiO2. [Wrong Answer] |
D. | Red color is imparted to glass by addition of arsenic oxide. [Correct Answer] |