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13 points
ETHYNES is validvalid
ETHYNE, a flammable gas [n]
ETHYNE, a colourless toxic inflammable gas formed by the action of water on calcium carbide, aka acetylene [n]
ETHYNE, a flammable gas [n]
ETHYNE, a colourless toxic inflammable gas formed by the action of water on calcium carbide, aka acetylene [n]