All of the group 13 elements form ionic halides except

boron

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thallium

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gallium

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Solution

The correct option is A boron
Boron has a high electronegativity (comparable to halogens) and a small atomic radius. Hence it forms covalent halides.

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Similar questions

Based on the group valency of elements state the formula for the following giving justification for each:

(i) Oxides of 1st group elements.

(ii) Halides of the elements of group 13.

(iii) Compounds formed when an element of group 2 combines with an element of group 16.

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