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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Covalent compounds have low melting point because
  • A
    Covalent bond is less exothermic
  • B
    Covalent molecules have definite shape
  • C
    Covalent bond is weaker than ionic bond
  • ✓
    Covalent molecules are held by weak Vander Waal's force of attraction
✓

Answer

Correct option: D.
Covalent molecules are held by weak Vander Waal's force of attraction
d
The melting and the boiling points of covalent compounds are generally low because of the weak Van der Waals forces and so can be easily converted from liquid to gas or from solid to liquid.

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