Question

Which of the following oxide of nitrogen is coloured?

• A. N\(_2\)O
• B. NO
• C. NO\(_2\)
• D. N\(_2\)O\(_4\)

Hint:

NO\(_2\) is a reddish-brown gas and is the only colored nitrogen oxide in the given options.

Answer 1

The Correct Option is C

Step 1: Understanding nitrogen oxides.
Among the nitrogen oxides listed, NO\(_2\) (nitrogen dioxide) is the only one that is colored. It appears as a reddish-brown gas due to the absorption of light in the visible spectrum. The other nitrogen oxides are either colorless or have a very faint color.

Step 2: Conclusion.
The correct answer is (C) NO\(_2\).