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Uses of Calcium Carbonate

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Question

Total number of boron atoms present in compound formed in borax bead test of cupric ion in oxidizing flame is :

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Solution

$N a B_{4} O_{7} + C u S O_{4} \to 2 N a B O_{2} + C u (B O_{3})_{2} + S O_{3}$

2 boron atoms are present in $C u (B O_{3})_{2}$

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Uses of Calcium Carbonate

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