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

In borax bead test, the coloured ions give characteristic coloured beads due to the formation of:

A
Metal borates
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Metal metaborates
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Metal phosphate
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Metal tetraborates
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B Metal metaborates
The borax bead test is a part of the qualitative inorganic analysis to test the presence of certain metals. The coated bead is heated initially in a lower reducing flame and then a higher oxidizing flame. Mostly the characteristic colours arises due to the formation of metal metaborates salts of chromium, copper or nickel.

Na2B4O7+CuSO42NaBO2+Cu(BO2)2Copper metaborate.(blue)+SO3
Option B is the correct answer.

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