1.

NaBH_(4)+l_(2)toXuarr+Yuarr+2Nal X+C_(2)H_(5)OHtoY uarr+D X+HCl to Y uarr +E D gives folowwing colour with flame.

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Solution :`X:B_(2)H_(6) , Y:H_(2)`
`NaBH_(4)+l_(2)to B_(2)H_(6) UARR +H_(2) uarr+2Nal`
`B_(2)H_(6)+C_(2)H_(5)OH to H_(2) uarr+ B(OC_(2)H_(5))_(3)`
`B_(2)H_(6)+HCl to H_(2) uarr +B_(2)H_(5)Cl`


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