Which of the following group `13` elements forms univalent halides which are more stable than the trihalides?A. `Al`B. `Ga`C. `Tl`D. `In`

Which of the following group `13` elements forms univalent halides whi

1.	Which of the following group `13` elements forms univalent halides which are more stable than the trihalides?A. `Al`B. `Ga`C. `Tl`D. `In`
Answer» Correct Answer - C The oxidation number `(+1)` is the most stable for `Tl`. Thus, thallium forms univalent thallous halides which are more stable than thallium trihalides. This illustrates the inert pair effect. `TIF` is ionic. `Al, Ga` and In all form monohalides `MX` in the gas phase at elevated temperatures: `AlCl_(3) + 2Al underset("temperature")overset(High)rarr 3AlCl` However, these compounds are not very stable and are covalent. `B` forms several stable polymeric monohalides `(BX)_(n)`.

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Which of the following group `13` elements forms univalent halides which are more stable than the trihalides?A. `Al`B. `Ga`C. `Tl`D. `In`

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