Question

When heated, which gas is formed from the mixture of copper and nitrogen(IV) oxide?

Options:
A) Nitrogen gas (N2)
B) Nitrogen dioxide gas (NO2)
C) Nitric oxide gas (NO)
D) Nitrous oxide gas (N2O)

Answer 1

When copper is heated with nitrogen(IV) oxide (nitric acid), the resulting gas is nitric oxide gas (NO), based on the provided chemical reaction.

Step-by-step explanation:

When copper is heated with nitrogen(IV) oxide, also known as nitric acid, a redox reaction occurs. According to the chemical equation provided:

1. 3Cu(s) + 8HNO3(aq) => 2NO(g) + 3Cu(NO3)2(aq) + 4H2O(l)

This reaction clearly shows that the gas formed is nitric oxide (NO). Therefore, the correct answer is C) Nitric oxide gas (NO).