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Q.

Borax bead is a mixture of ___?

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a

$N a B O_{2} + B_{2} O_{3}$

b

$N a_{2} B_{4} O_{7} + B_{2} O_{3}$

c

$H_{2} B_{4} O_{7} + B_{2} O_{3}$

d

$N a_{2} B_{4} O_{7} + 10 H_{2} O + B_{2} O_{3}$

answer is A.

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Detailed Solution

Borax bead is a mixture of sodium metaborate and Boric anhydride. It is formed when moistened borax is heated in a flame.

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