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The statements regarding ‘B’ and Al are
I) Boron is a bad conductor of heat and electricity
II) Aluminium hydrides are stable
III) Maximum covalency of Boron is 4
The correct statements are

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III is only correct

All are correct

Only I is correct

I and III are correct

answer is B.

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Detailed Solution

Maximum covalency of B is 4,due to presence of only three valency orbitals ,those are one ns orbital and three np orbitals.

Boron is bad conductor of electricity and heat,because boron is non metal.

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