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A certain salt X, gives the following re...

A certain salt X, gives the following result.
It swells up to a glassy meterial Y on strong heating.

Text Solution

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When the salt (X) is heated, it swells up to form a glassy meterial. Therefore, (X) must be boraxand (Y) must be mixture of sodium metaborate `(NaBO_2)` and boric anhydride `(B_2O_3)`.
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