Answer:
a. HNO₃
Step-by-step explanation:
Nitric acid -
The chemical formula for nitric acid is - HNO₃ , with molecular mass of 63 g /mol , having one hydrogen atom, one nitrogen atom and 3 oxygen atoms .
Nirtic acid is a colorless solution , but the left over solution turns yellow as it get decomposed to nitrogen oxide and water .
The commercially used nitric acid is 68 % in water .
and more than 86% nitric acid is fuming nitric acid .
The reagent nitric acid is used a source of nitration .