Formula and colour of cobalt metaborate is - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
$Co {({BO}_{2})}_{3}$ , Yellow
B
$Co {({BO}_{2})}_{2}$ , Red
C
$Co {({BO}_{2})}_{3}$ , Green
D
$Co {({BO}_{2})}_{2}$ , Blue

Solution:

${Na}_{2} B_{4} O_{7} . 10 H_{2} O \overset{∆}{\to} {Na}_{2} B_{4} O_{7} \overset{fuse}{\to} \underset{colour less glassy bead}{{NaBO}_{2} + B_{2} O_{3}}$

$CoO + B_{2} O_{3} \overset{}{\to} \underset{Blue}{Co {({BO}_{2})}_{2}} .$

Solution:

Related content