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What is the safe scientific method for smelling a chemical?

Answer and explanation

Correct answer: Gently waft vapour towards the nose with a hand

The direct answer is A: gently waft vapour towards the nose with a hand. Chemicals may be poisonous, irritating, or harmful even in small amounts, so their vapour should never be inhaled directly. Keep the container at a safe distance, do not place the nose over it, and use one hand to move a small amount of vapour towards the nose while following laboratory instructions. A is correct because it reduces the amount reaching the nose. B is dangerous because direct inhalation can deliver a concentrated vapour. C is wrong because tasting any laboratory chemical is unsafe. D is wrong because heating may produce more vapour or dangerous products and is not a smelling method. Memory cue: never sniff; waft only when instructed.

Related tags

Chemical SafetyWaftingLaboratoryNature And Meaning Of ScienceExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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