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Chemical Reaction

Assertion A: ...

Question

Assertion (A): Among IIIA group elements boron has highest melting point
Reason (R) : Boron exists as a giant covalent polymer :

A

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

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B

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

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C

A is true but R is false

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D

A is false but R is true.

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Solution

The correct option is B Both A and R are true and R is correct explanation of A
Due to very strong crystalline lattice, boron has unusually high melting point.

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