Consider the following compounds in the liquid form :
$\mathrm{O}_2, \mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3, \mathrm{H}_2 \mathrm{O}_2, \mathrm{CCl}_4, \mathrm{CHCl}_3, \mathrm{C}_6 \mathrm{H}_6, \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}$.
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
Here polar molecules in the liquid form will be attracted/deflected near charged comb.
Polar molecules : $\mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3, \mathrm{H}_2 \mathrm{O}_2, \mathrm{CHCl}_3, \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}$ (6-polar molecules)
Nonpolar molecules : $\mathrm{O}_2, \mathrm{CCl}_4, \mathrm{C}_6 \mathrm{H}_6$
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