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Question

Choose the products formed by action of Na2CO3 on H3BO3

A
Na2B4O7,CO2 and O2
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B
Na2B4O7,CO2 and H2O
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C
Na2B4O7,CO2 and C
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D
Na2B4O7,O2 and CO
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Solution

The correct option is B Na2B4O7,CO2 and H2O
Sodium carbonate react with Orthoboric acid to form borax, H2O and CO2. This reaction is used in a preparation method of Borax from colemanite.
4H3BO3+Na2CO3Na2B4O7+6H2O+CO2

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