Question

Seema added a few pieces of copper turnings to a test tube containing concentrated acid P and she noticed that a reddish-brown gas evolved.

1. Name the acid P used by Seema.
2. Write a balanced chemical equation for the reaction that took place.

Answer 1

1. Concentrated nitric acid (HNO₃)
2. \[\ce{Cu + 4HNO3 -> Cu(NO3)2 + 2H2O + 2NO2}\]