Molecules with bonds can absorb visible light, with longer conjugated systems absorbing light of longer wavelength. (conjugated/non-conjugated)

Increasing order of stability of the resonance structure is:

Among the given species the Resonance stabilised carbocations are:

The chlorine atom of the following compound

that reacts most readily with ${\mathrm{AgNO}}_3$ to give a precipitate is

The most acidic proton and the strongest nucleophilic nitrogen in the following compound

respectively, are

Draw the resonance structures for the following compound. Show the electron shift using curved-arrow notation.

${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCHO}$

Draw the resonance structures for the following compound. Show the electron shift using curved-arrow notation.

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2$