Question

Copper metal reacts with dilute nitric acid in the absence of air. Which products are present?

1. copper (II) nitrate, nitrogen monoxide, and hydrogen gas
2. copper (I) nitrate, water and hydrogen gas
3. copper (II) nitrate, nitrogen monoxide and water
4. copper(I) nitrate and water
5. copper (III) nitrate, nitrogen monoxide and water

Is it 3. copper (II) nitrate, nitrogen monoxide and water?

Answer 1

The operative word is dilute..
http://www.angelo.edu/faculty/kboudrea/demos/copper_HNO3/Cu_HNO3.htm

yes.