The structural formula of $2-$butene is _____.

The IUPAC name of the following compound is:

When water gas is mixed with half its volume of hydrogen and the mixture is compressed 300 atmospheric pressure and passed over $\mathrm{ZnO}.{\mathrm{Cr}}_2{\mathrm{O}}_3$ catalyst a colourless liquid is obtained which is used as a solvent for paint and varnishes. The liquid will be 

According to the IUPAC system which type of compound is shown by the given structure:

Draw the structure of the compound of carbon given below.

Chloropropane.

IUPAC name of the following compound will be

Draw the structures of the following.

(i) Hexanal

(ii) Propanone

Complete the following table:

Straight chain of Carbon compounds	Structural formula	Molecular formula	Name
$\mathrm{C}$		${\mathrm{CH}}_4$	Methane
$\mathrm{C}-\mathrm{C}$	_____	_____	Ethane
$\mathrm{C}-\mathrm{C}-\mathrm{C}$	_____	${\mathrm{C}}_3{\mathrm{H}}_8$	_____
$\mathrm{C}-\mathrm{C}-\mathrm{C}-\mathrm{C}$		_____	_____

Which of the following is the ketone functional group, $\mathrm{R}=(-{\mathrm{CH}}_3)$, $\mathrm{R}$ is Alkyl group.