1.

Which of the hydracids of halogens reacts with glass?

Answer»

Solution :HF. FLUORIDE ION due to its strong AFFINITY for Si attacks silicates and silica PRESENT in glass.
`Na_(2)SiO_3+ 6HF RARR Na_2 SiF_6 + 3H_2O`
`SiO_2 + 4HF rarr SiF_4 + 2H_2O`


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