Question

Identify the correct method by which carbon dioxide is produced.

(a) By the incomplete combustion of coal or petrol

(b) During volcanic eruptions

(c) Mainly by automobile exhaust

(d) By burning sulfur containing fossil fuels.

This question was posed to me in a national level competition.

This intriguing question originated from Environmental Chemistry topic in portion Environmental Chemistry of Chemistry – Class 11

Answer 1

The correct option is (b) During volcanic eruptions

The explanation is: Volcanic eruptions produce carbon dioxide. The gas is released either during eruptions or through underground magma. Carbon dioxide through underground magma is released through vents, porous rocks, etc. that feeds volcanic lakes. Due to the production of significant amounts of carbon dioxide, volcanoes also contribute to global warming.