1.

The intermolecular forces of attraction (i.e., H-bonding and van der waal's forces) exist among polar and non-polar species which effect melting point, boiling point, solubility and viscosity of covalent compounds : Q. Meltingand boling points of halogen increasedown the group due to

Answer»

INCREASE in London dispersion FORCES
Increase in extentof polarity
Increase in Molecular mass
Both (a) and (b)

SOLUTION :`to` Halogens are non-polar species, hence London dipersion forces ACT among them and these forces are directly propotional to molecular weight.
`to`London dispersion forces `prop`B.P and M.P in such non-polar species.


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