Pick out the wrong statement?

A. Red color is imparted to glass by addition of arsenic oxide

B. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2

C. Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or

D. Hard glass which is used for making laboratory glass wares is a mixture of sodium

E. osilicate and aluminium borosilicate

F. enic oxide

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