Nitrogen Family

Question 1

Nitric Acid

Answer 1

HNO3 is a colorless liquid with boiling point of 86 degrees Celsius. Miscible w/ water in all proportions.
Rarely produces hydrogen when reacted with metals since it is unstable and decomposes easily. Good oxidizing agent.
Concentrated HNO3 + Cu forms NO2 (heavy, red-brown, smelly gas) but Dilute HNO3 + Cu forms NO (colorless, immediately oxidized into NO2). Most dilute HNO3 may form N2O; w/ active metal, NH4+ may form.
HNO3+HCl=Aqua regia

Question 2

Nitrogen

Answer 2

Colorless, odorless, tasteless, rather inactive (b/c triple covalent bond) gas. 79% of the air is N2.