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Identify the compound A, X and Z in the ...

Identify the compound `A`, `X` and `Z` in the following reactions:
(i) `A+2HCl+5H_(2)Orarr2NaCl+X`
(ii) `Xunderset(370k)overset(Delta)rarrHBO_(2)underset(gt370k)overset(Delta)rarrZ`

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(i) `Na_(2)B_(4)O_(7)+2HCl+5H_(2)Orarr2NaCl+4H_(2)BO_(3)`
(ii) `H_(3)BO_(3)underset(370k)overset("heat")rarr HBO_(2)underset(gt370k)overset("heat")rarrB_(2)O_(3)`
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Identify the compounds X and Y in the following reactions : (a) Na_(2)B_(4)O_(7) + 2HCl + 5H_(2)O to 2NaCl + X (b) X overset(370k)toHBO_(2)overset(gt370)to Y.

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DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Short answer type
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