The pBlock Elements - Result Question 8

####9. In borax bead test which compound is formed?

[2002]

(a) Ortho-borate

(b) Meta-borate

(c) Double oxide

(d) Tetra-borate

Show Answer

Solution:

(b) Na2B4O710H2O10H2OΔ

Na2B4O7Δ2NaBO2+B2O3 anhydrous  sod.metaborate Boric anhydride CuO+B2O3Cu(BO2)2 cupric meta borate(Blue beed) 



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