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Correct statement among the following is

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Aqueous solution of borax is acidic in nature

Aluminium is the most abundant element in the earth's crust

Diborane is an electron rich molecule

Boron is the hardest but the lightest element of 13^th group

answer is D.

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Detailed Solution

Aluminium is the most abundant metal and third most abundant element in earth's crust.

Borax undergoes anionic hydrolysis.Aqueous solution of borax is alkaline in nature

Diborane is an electrophile (electron deficient)

(4) is correct ;

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