Draw the resonance structures of the following compound;

${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{Cl}:$

Draw the resonance structures of the following compound;

${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$

Draw the resonance structures of the following compound;

${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{HC}=\mathrm{O}$

Identify the most stable species in the following set of ions giving reasons:

$\stackrel{+}{\mathrm{C}}{\mathrm{H}}_3, \stackrel{+}{\mathrm{C}}{\mathrm{H}}_2\mathrm{Br}, \stackrel{+}{\mathrm{C}}{\mathrm{HBr}}_2,\stackrel{+}{ \mathrm{C}}{\mathrm{Br}}_3$

Identify the most stable species in the following set of ions giving reasons:

$\stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_3, \stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_2\mathrm{Cl}, \stackrel{⊝}{\mathrm{C}}{\mathrm{HCl}}_2, \stackrel{⊝}{\mathrm{C}}{\mathrm{Cl}}_3$

Which of the following compound will not exist as resonance hybrid. Give reason for your answer:

${\mathrm{CH}}_3\mathrm{OH}$

Which of the following compounds will not exist as resonance hybrid. Give reason for your answer:

(i) ${\mathrm{CH}}_3\mathrm{OH}$        (ii) $\mathrm{R}-{\mathrm{CONH}}_2$    (iii) ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_2{\mathrm{NH}}_2$

Which of the following compound will not exist as resonance hybrid. Give reason for your answer:

${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_2{\mathrm{NH}}_2$