Which reactions are difficult for alkanes?

What is obtained by the electrolysis of an aqueous solution of $CH_3COOK$?

Which one of the following reactions gives the product with a lesser number of carbon atoms than the starting material?

In the alkane $CH_3-CH_2-C(CH_3)_2-CH_2-CH(CH_3)_2$,identify $1^{\circ}$,$2^{\circ}$,and $3^{\circ}$ carbon atoms and give the number of $H$ atoms bonded to each one of these.

The number of monobromo isomers of neopentane is ........ .

Aluminum carbide on reaction with $D_2 O$ gives $Al(OD)_3$ and '$X$'. What is '$X$'?