She entered the forest, and the darkness was crushing, suffocating her.
It is a colourless gas which possesses a characteristic suffocating odour.
Nature has provided several species of animals, birds and reptiles, to feed upon these insects, and various poisonous and suffocating compounds are used to destroy them, but with no great degree of success.
Tetranitromethane, C(N02)4, obtained by adding nitroform to a hot mixture of nitric and sulphuric acids, is a crystalline solid which melts at 13° C. Chlorpicrin, CC1 3 NO 2, is a liquid of suffocating odour obtained by the action of nitric acid and chloride of lime on many organic compounds.
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