Question

Concentrated nitric acid is not used for the preparation of HCL why

Answer 1

HEY USER!

CONCENTRATED NITRIC ACID IS NOT USED IN PREPARATION OF HCL BECAUSE NITRIC ACID IS A STRONG OXIDIZING AGENT SO IT ITSELF GETS REDUCE INTO ANY FORM

Answer 2

Nitric Acid is a very strong oxidising agent. It oxidizes the Dihydrogen Gas produced during the reaction with metals to Water. That is why, Nitric Acid cannot be used for preparation of hydrogen gas.

However, metals like Magnesium and Manganese still produce Hydrogen Gas but with very dilute nitric acid.
because it decomposes to yield nascent oxygenas:2HNO3 →2NO2 + H2O + [O])