First slide

Atomic and physical properties

Question

Assertion (A) : Boron has unusually high melting point.
Reason (R) : Boron has very strong crystalline lattice.

Easy

A

Both A and R are correct; R is the correct explanation of A.
B

Both A and R are correct; R is not the correct explanation of A.
C

A is correct; R is incorrect
D

A is incorrect; R is correct

Solution

Because of strong crystalline lattice of boron, it has high melting point.

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