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Q.

Boron does not form B3+ ions where as Al forms Al3+ ions. This is because

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a

The size of B atom is larger than that of Al

b

The sum of IE1 + IE2 + IE3 of B is much higher than that of Al

c

The sum of IE1 + IE2 + IE3 of Al is much higher than that of B

d

Both 1 and 2

answer is B.

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Detailed Solution

Due to its small size and high sum of first three ionisation energies B can't loose it's three valency electrons and can't form B+3 ion
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Boron does not form B3+ ions where as Al forms Al3+ ions. This is because