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Q.
Which of the following is a colored gas?
Bihar CECEBihar CECE 2009The p-Block Elements
Solution:
Nitrous oxide $\left( N _{2} O \right)$ nitric oxide (NO) and hydrogen $\left( H _{2}\right)$ all are colourless gases while nitrogen dioxide $\left( NO _{2}\right)$ is a reddish brown gas.