What is the colour of the flame obtained on burning the vapours of ethyl borate?

Explanation

To determine the color of the flame obtained on burning the vapors of ethyl borate, we can follow these steps:

### Step 1: Understand the Reaction
When borax is heated with ethanol, it produces triethyl borate. This is the compound we are interested in when it comes to its combustion properties.

### Step 2: Write the Chemical Equation
The reaction can be represented as:
\[ \text{Boric Acid (H}_3\text{BO}_3\text{) + Ethanol (C}_2\text{H}_5\text{OH) } \rightarrow \text{Triethyl Borate (C}_6\text{H}_{15}\text{BO}_3\text{)} \]
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