sulfur dioxide _____.
a) creates a reddish-brown haze in the sky
b) is a secondary air pollutant
c) has an irritating odor and is colorless
d) is relatively harmless to the environment

Sulfur dioxide refers to a gas. It has a nasty, sharp smell and is invisible. It associates with other components to produce harmful compounds like sulfurous acid, sulfuric acid, and sulfate particles. It is the chemical compound with the formula SO. At standard temperature, it is a toxic gas with an irritating and pungent smell. The gas is released naturally by the volcanic activity.

sulfur dioxide _____. a) creates a reddish-brown haze in the sky b) is a secondary air pollutant c) has an irritating odor and is colorless d) is relatively harmless to the environment

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sulfur dioxide _____.
a) creates a reddish-brown haze in the sky
b) is a secondary air pollutant
c) has an irritating odor and is colorless
d) is relatively harmless to the environment