Question

If a compound has a number of individual dipoles, then:

(I) It is polar overall.

(II) There is an electronegativity difference between the bonded atoms.

(III) it is ionic.

(IV) It doesn't have resonance.


(A) II only

(B) II, IV

(C) I, II, IV

(D) I, III

(E) All of the above statements are correct.

Answer 1

(A) II only

Step-by-step explanation:

If a compound has a number of individual dipoles, then:

(I) It is polar overall. FALSE. If the individual dipoles cancel each other (as it happens in a symmetrical molecule), the net dipole moment is zero.

(II) There is an electronegativity difference between the bonded atoms. TRUE. If the difference in electronegativity between the elements is higher than zero and lower than 1.7, the bond is polar covalent.

(III) it is ionic. FALSE. If there is a number of individual dipoles, the bonds are most likely to be covalent.

(IV) It doesn't have resonance. FALSE. There is no relation between the resonance and the polarity of the bonds.