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Which of the following is not poisonous?

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in Chemistry – Class 12 by (188k points)
Which of the following is not poisonous?

(a) H2O

(b) H2S

(c) H2Se

(d) H2Te

The question was posed to me during an interview for a job.

The query is from P-Block topic in portion P-Block Elements of Chemistry – Class 12

1 Answer

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Best answer
Right option is (a) H2O

Easy explanation: The hydride of Oxygen, i.e., H2O is a colourless, odourless liquid while the hydrides of all the other group 16 elements are unpleasant, foul smelling, poisonous gases. H2O has the highest boiling point of 373 K amongst the hydrides of group 16 elements.

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