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Question

Which of the following is/are anomaly(ies) of boron?

A
metallic nature
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B
allotropy
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C
+1 oxidation state
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D
non-metallic nature
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Solution

The correct option is D non-metallic nature
Boron is a non-metal while other group 13 elements are metals. It is due to the high electronegativity and the small atomic radius of boron. Due to the same reason, it doesnot exihibit +1 oxidation state.
Boron can exist as both amorphous and crystalline solid.

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