1.

A white precipitate (X) is formed when a mineral of Boron (W) is bolied with Na_(2)CO_(3) solution. The precipitate is filtered and the filtered contains two compounds (Y) and (Z). The compound (Y) is removed by crustallization. By passing CO_(2) through (Z) changes to (Y). 'W' is

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Colemanite
Borax
Cobalt TETRA borate
Kernite

Answer :A


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