Q.

Assertion (A): Boron has highest melting point in group 13, that is 2453K.
Reason (R): Boron has solid crystalline lattice structure.

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a

Both A and R are correct and R is the correct explanation of A

b

Both A and R are correct and R is the not correct explanation of A

c

Both A and R are correct

d

A is correct and R is incorrect

answer is A.

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Detailed Solution

Due to very strong crystalline lattice boron has very high melting point

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Assertion (A): Boron has highest melting point in group 13, that is 2453K.Reason (R): Boron has solid crystalline lattice structure.