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Which substance has a dipole moment? (a) CCl4 (b) CH2Cl2 (c) C2Cl2 (d) C2Cl4
CCl4 and CH2Cl2
They Both are in a tetrahedral configuration, so the two Cl atoms in CH2CL2 do not cancel out, they are additive. Hence DM >0 But in CCl4 having same tetrahedral configuration and their Cl group is Cancelling out each other. Hence DM=0
C2Cl2 and C2Cl4
C2Cl2 is a linear molecule Cl-CC-Cl so its dipole moment becomes zero and it behaves as a non polar moleculeC2Cl4 is symmetrical and is nonpolar.Hence DM=0
So, The Ans is (A)
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