Q. Methane is a colourless, odourless, non-toxic but flammable gas. What is its common name? Answer:
Marsh gas
Notes: The common name of methane CH4 is Marsh gas, especially as generated by decaying matter in marshes.
Marsh gas has no color or odor.
It is lighter than air and has a specific gravity of 0.554.
It is only slightly soluble in water but is more soluble in ethyl alcohol and ethyl ether.
It is generally very stable.
It burns readily in air and produces carbon dioxide and water vapor.