Answer:
(i) As the intermolecular distance r decreases, the force of attraction between the molecules increases. (ii) When the distance decreases to \[{{r}_{1}},\] the force of attraction is maximum. (iii) As the distance further decreases, the attractive force goes on decreasing and when the distance decreases to\[{{r}_{0}}\], the force becomes zero. When the distance decreases below \[{{r}_{0}}\], the molecules begin to repel and the repulsive force increases rapidly.
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