1.

(a) Na_(2)B_(4)O_(7)+concentrated H_(2)SO_(4)+H_(2)O to underset((ii)"ignite")overset((i)C_(2)H_(5)OH)to (B) (B) is identify by the characteristic colour of the flame. Identify (A) and (B). (b) Complete the following reaction and identify the products formed.Na_(2)B_(4)O_(7)

Answer»

Solution :(a) `Na_(2)B_(4)O_(7)+`concentrated `H_(2)SO_(4)+5H_(2)O to Na_(2)SO_(4)+4H_(3)BO_(3)`
`H_(3)BO_(3)+3C_(2)H_(5)OH to B(OC_(2)H_(5))_(3)` -voltale (burn with green edged flame) + `3H_(2)O`
(b) `Na_(2)B_(4)O_(7) underset((NaBO_(2))oversetDeltato(##RES_INO_CHM_XI_C06_S01_004_S01.png" width="80%">


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