Consider the following compounds in the liquid form: $O_{2}, H F, H_{2} O, N H_{3}, H_{2} O_{2}, C C l_{4}, C H C l_{3}, C_{6} H_{6}, C_{6} H_{5} C l$

When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?

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Solution

Only polar molecules are deflected by charged comb because the deflection is mainly due to some extent of electrostatic interactions.
Here polar molecules are: $H F, H_{2} O, N H_{3}, H_{2} O_{2}, C H C l_{3}, C_{6} H_{5} C l$
Non-polar molecules are: $O_{2}, C C l_{4}, Benzene$

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C_{6} H_{6} + {H N O}_{3} + H_{2} {S O}_{4} 50^{0} - 60^{0} - ---- \to A S n + H C l - ---- \to B {C H}_{3} C O C l - ----- \to C

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