The molecule having non-zero dipole moment is-
A)H2O2 B)CH4 C)C2H6 D)BF3 E)B2H6
Which of the following has zero dipole moment?
A)H2O B)PCl3 C)SiF4 D)CFCl3
How I choose the correct option of the above type of questions easily wthin one minute in competitive exam?Please sir tell me the short way of thinking.
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