Question

Atmospheric content of $C{O}_2$ is

• A. $0.0036\%$
• B. $0.036\%$
• C. $0.36\%$
• D. $3.6\%$

Answer 1

The correct option is B $0.036\%$

Carbon dioxide is a colourless gas with a density of about 60% higher than that of dry air. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas. The current concentration is about 0.04% (410 ppm) by volume, having risen from pre-industrial levels of 280 ppm. Carbon dioxide is odourless at normally encountered concentrations. However, at high concentrations, it has a sharp and acidic odour.

So the correct answer is '0.036%'.