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Question

Which of the following forms M3+ more easily among group 13 elements?


A

Ga

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B

B

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C

Al

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D

Tl

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Solution

The correct option is C

Al


B generally forms covalent compounds due to higher ionisation enthalpy. Other elements except Al predominantly forms M+ ion instead of M3+ due to inert pair effect. Hence Al forms Al3+ more easily among group 13 elements.


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