Question

what is action of the following Boron HNO3

Answer 1

Reaction of boron (HNO3):
Boron usually doesn't react with acids and alkalis only in highly divided state. when it reacts with HNO3,it gives boric acid. this gives high temperature.
B + 3HNO3 -------> H3BO3 + 3NO2

Answer 2

Explanation:

Boron does not react with acids and alkalis in normal conditions. However, when boron is in highly divided state it reacts with nitric acid. The strongest oxidizing agent is nitric acid and it oxidizes non-metals. In the process, it gets reduced to one of its oxides.  

Nitric acid on reaction with non-metals that are water soluble, it results in the formation of the corresponding acid. So when boron reacts with nitric acid, we get boric acid.

The chemical reaction is given below:

$\mathrm{B}+3 \mathrm{HNO}_{3} \rightarrow \mathrm{H}_{3} \mathrm{BO}_{3}+3 \mathrm{NO}_{2}$