Which Poisonous Gas Has a Sweet Smell?
Which poisonous gas has a sweet smell? Acetylene is a colourless, poisonous gas with a sweet smell. It is also called ethyne and can be made from natural gas. This...
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How Did Canaries Help Coal Miners?
How did canaries help coal miners? There was a time when coal miners wouldn’t set foot in a coal mine without a canary present. Canaries protected them from a danger...
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