1.

Write the chemicalreactionassociatedwith the ''boraxbeat test'' of cobalt (II) oxide

Answer»

Solution :Whenborax inheated , a colourless glassy head is formed of the following composition
`Na_(2)B_(4)O_(7) 10H_(2)O rarr Na_(2)B_(4)O_(7) + 10H_(2)O`
`Na_(2) B_(4)O_(7) OVERSET(Delta ) to+ 2NaBO_(2) + B_(2)O_(3)`
`Co(II) "salt" overset(Delta) to CoO +` some GAS
`CoO + B_(2)O_(3) overset(Delta) to Co(BO_(2))_(2)`
A BLUE - coloured head ofcoball METABORATE is formed


Discussion

No Comment Found

Related InterviewSolutions