A certain salt X gives the reaction,When...

A certain salt X gives the reaction,When Con.`H_2SO_4` is added to a hot solution of X, white crystals of an acid Z separates out. Identify X, and Z.

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The correct Answer is:

`Na2B_4O_7.10H_2O+H_2SO_4rarr4H_3BO_3+Na_2SO_4+5H_2O`

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