Question

In how many of the following the concept of resonance can be observed
CH, =CH-Cl;
CH-0-CH-CH
CH, -0-CH, CH-CH,
CH, -NH-CH2-CH-CH
CH2 - CH = CH - NH;
CH, -CH-CH -NH-CH​

Answer 1

CH, =CH-Cl;

CH-0-CH-CH

CH, -0-CH, CH-CH,

CH, -NH-CH2-CH-CH

CH2 - CH = CH - NH;

CH, -CH-CH -NH-CH