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Boron has an exceptionally high melting ...

Boron has an exceptionally high melting point in the group `13^(th)` elements, because -

A

boron has the smallest size in the group

B

boron atoms are joined by Vander Waals force

C

boron is covalent solid

D

boron has higher ionisation energy

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Boron has an extremely high melting point because of

    A
    Allotropy
    B
    Its ionic crystal structure
    C
    Strong van der Waals forces between its atoms
    D
    Strong binding forces in the covalent polymer.
  • The metal with exceptionally low melting point is:

    A
    potassium
    B
    copper
    C
    calcium
    D
    aluminium
  • The reason for exceptionally high boiling point of water is

    A
    Its high specific heat
    B
    Its high dielectric constant
    C
    Low ionization of water molecules
    D
    Hydrogen bonding in the molecules of water
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