Write the number of $\mathrm{\sigma }$ and $\mathrm{\pi }$ bonds in the following molecules?

$\left(\mathrm{a}\right)$ 

$\left(\mathrm{b}\right)$ 

$\left(\mathrm{c}\right)$ 

Find the number of $1°, 2°$ and $3°$ hydrogen atoms in the following compounds.

$\left(\mathrm{a}\right)$ 

$\left(\mathrm{b}\right) {\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

$\left(\mathrm{c}\right)$ ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Find the hybridization state of each carbon atoms in following compound?

${\mathrm{CH}}_2=\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_2-{\mathrm{NH}}_2$

Expand each the following condensed formulae into their complete structural and bond line formula:

$\left(1\right)$ ${\mathrm{HOCH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2$

$\left(2\right)$ ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_3\mathrm{OH}$

$\left(3\right)$ ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{COCH}}_2{\mathrm{CH}}_3$

$\left(4\right)$ ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_3{\mathrm{CH}}_3$

Find $\mathrm{DU}$ of following compound:

$\left(\mathrm{a}\right)$ ${\mathrm{C}}_5{\mathrm{H}}_{10}$

$\left(\mathrm{b}\right)$ 

Find $\mathrm{DU}$ of following compound:

$\left(\mathrm{a}\right)$ ${\mathrm{C}}_6{\mathrm{H}}_6\mathrm{O}$

$\left(\mathrm{b}\right)$ ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{I}$

$\left(\mathrm{c}\right)$ ${\mathrm{C}}_5{\mathrm{H}}_9\mathrm{N}$

Draw formula for the first four members of each homologous series beginning with the following.

$\left(\mathrm{a}\right)$ $\mathrm{H}-\mathrm{COOH}$

$\left(\mathrm{b}\right)$ $\mathrm{H}-\mathrm{CH}={\mathrm{CH}}_2$

$\left(\mathrm{c}\right)$ 

Classify the following compounds as homocyclic, heterocyclic, alicyclic, aromatic, saturated and unsaturated.

$\left(\mathrm{a}\right)$ 

$\left(\mathrm{b}\right)$ 

$\left(\mathrm{c}\right)$ 

$\left(\mathrm{d}\right)$ 

Indicate the following as $1°, 2°$ and $3°$ amines.

$\left(\mathrm{a}\right)$ 

$\left(\mathrm{b}\right)$ 

$\left(\mathrm{c}\right)$ 

$\left(\mathrm{d}\right)$