wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The mineral colemanite is finely powdered and boiled with sodium carbonate solution. The precipitate of CaCO3 and other two products X and Y are formed. On passing a current of CO2,Y produces X. Which of the following statement is correct about X?

A
Oxidation state of boron in compound X is +1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
It is used in bead test
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
It is a black crystaline solid
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B It is used in bead test
The mineral colemanite is finely powdered and boiled with sodium carbonate solution.
Ca2B6O11+2Na2CO3(i)Fuse−−−(ii)H2O2CaCO3+Na2B4O7X+2NaBO2Y
On passing current of CO2, Y produces X.
4NaBO2X+CO2Na2B4O7X+Na2CO3
Na2B4O7X is used in borax bead test.
Na2B4O7XΔ2NaBO2+B2O3(glassy bead)

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Borax
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon