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Borax when heated on platinum wire forms...

Borax when heated on platinum wire forms a glass like bead which is made up of :

A

Sodium tetraborated

B

sodium metaborate

C

sodium metaborate and boric anhydride

D

boric anhydride and sodium tetraborate

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To solve the question regarding what borax forms when heated on a platinum wire, we can follow these steps: ### Step-by-Step Solution: 1. **Identify Borax Composition**: Borax is chemically represented as Na2B4O7·10H2O. It is a hydrated sodium borate. 2. **Heating Borax**: When borax is heated, it undergoes a thermal decomposition reaction. The water of hydration is released, and the compound breaks down into simpler products. 3. **Products of Heating**: The heating of borax leads to the formation of two main products: - Sodium Metaborate (NaBO2) - Boric Anhydride (B2O3) 4. **Formation of Glass-like Bead**: The combination of sodium metaborate and boric anhydride results in a glass-like bead. This bead is transparent and resembles glass, which is why it is often referred to as a "glass bead." 5. **Conclusion**: Therefore, the glass-like bead formed from the heating of borax consists of sodium metaborate and boric anhydride. ### Final Answer: The glass-like bead formed when borax is heated on a platinum wire is made up of **Sodium Metaborate (NaBO2) and Boric Anhydride (B2O3)**.
To solve the question regarding what borax forms when heated on a platinum wire, we can follow these steps: ### Step-by-Step Solution: 1. **Identify Borax Composition**: Borax is chemically represented as Na2B4O7·10H2O. It is a hydrated sodium borate. 2. **Heating Borax**: ...
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Borax [Na_(2)B_(4)O_(7).10H_(2)O] when heated on platinum loop it gives a dark transparent glass like bead. The hot bead is dipped in the salt till it reacts with transition metal oxide. It produces characteristic bead of meta borate. {:(" Colour of the bead"," lon"),("(a) Blue green or light blue",Cu^(+2)),("(b) Yellow",Fe^(+2)or Fe^(+3)),("(c) Green",Cr^(+3)),("(d) Violet",Mn^(+2)),("(e) Dark blue",Co^(+2)),("(f) Brown",Ni^(+2)):} Glassy bead is of

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