Pick out the wrong statement.

Question

Options:

A . Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate

B . Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide

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

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

Answer: Option D

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