Which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. view available hint(s) which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity.

a. o=c=o and o≡c−o
b. n≡n and br−br
c. n≡c− and n≡c−h
d. o=n−f and n=o−f

A. O=C=O and O≡C−O

Explanation:

Resonance:                                                                                                                

          When the electron distribution on the molecule become uneven like one molecule have more electron compare to other.Resonance occurs due to overlap of the orbitals.When electron flow through pi system then resonance occurs.

So the option A is correct.

A. O=C=O and O≡C−O

b i think it’s a water wheel turning in a stream

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong