On strong heating, boric acid (H3BO3) undergoes decomposition to produce several products including 1-B, 2-B2H6, 3-B2O3, and 4-BO2. Let's explore each of these products and the reactions involved in their formation.

1. Formation of 1-B:
When boric acid is strongly heated, it undergoes dehydration to form metaboric acid (HBO2). Metaboric acid further loses water to yield boric oxide (B2O3), which then reacts with excess boron to form boron suboxide (B6O). This reaction can be represented as follows:
2H3BO3 → 2HBO2 + H2O
2HBO2 → B2O3 + H2O
B2O3 + 3B → 2B6O

2. Formation of 2-B2H6:
Boric acid can also undergo reduction with hydrogen gas (H2) to produce diborane (B2H6) and water (H2O). This reaction occurs at high temperatures and is commonly used to synthesize diborane. The reaction can be represented as follows:
4H3BO3 + 11H2 → 2B2H6 + 9H2O

3. Formation of 3-B2O3:
As mentioned earlier, boric acid can undergo dehydration to form boric oxide (B2O3). This is a common reaction that occurs when boric acid is heated strongly. The reaction can be represented as follows:
2H3BO3 → B2O3 + 3H2O

4. Formation of 4-BO2:
Boric acid can also undergo further oxidation to form metaboric acid (HBO2) and water (H2O). Metaboric acid then decomposes into boric oxide (B2O3) and water. The reaction can be represented as follows:
2H3BO3 + O2 → 2HBO2 + 2H2O
2HBO2 → B2O3 + H2O

In summary, strong heating of boric acid leads to various products depending on the reaction conditions. The main products include 1-B, which is formed through the reaction between boric oxide and boron, and 2-B2H6, which is formed through the reduction of boric acid with hydrogen gas. Additionally, boric acid can undergo dehydration to produce 3-B2O3, and further oxidation to yield 4-BO2. These reactions demonstrate the versatility of boric acid and its ability to form different compounds under varying conditions.

It may be B2 O3