Which of the following elements is more reactive with air?(a) indium(b) gallium(c) thallium(d) all three are equally reactiveI had been asked this question in an interview for internship.This is a very interesting question from p-Block Elements topic in section p-Block Elements of Chemistry – Class 11

Which of the following elements is more reactive with air?(a) indium(b

1.	Which of the following elements is more reactive with air?(a) indium(b) gallium(c) thallium(d) all three are equally reactiveI had been asked this question in an interview for internship.This is a very interesting question from p-Block Elements topic in section p-Block Elements of Chemistry – Class 11
Answer» The CORRECT answer is (c) thallium The explanation: Thallium is more REACTIVE with their than gallium and indium, due to the formation of unipositive ion Tl^+. Thallium combines with oxygen in the air in order to form thallium oxide, Tl2O is more stable than TL2O3 due to inert pair EFFECT.

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