Haloalkanes and...

Which compound will not exhibit optical activity?

Which one of the following will form cyclohexane on reaction with two molecules of Na in ether.

The number of stereoisomers possible for a compound of the molecular formula $$ \mathrm { CH } _ { 3 } - \mathrm { CH } = \mathrm { CH } - \mathrm { CH } ( \mathrm { OH } ) \mathrm { Me } $$ is

Choose the correct statement about the following 

What happens when chlorobenzene is treated with $$KOH$$?

$$  (CH_3)_2C=CH_3 \quad \underset { \overrightarrow { P{ h }_{ 2 }{ O }_{ 2 } }  }{ HBr } \quad A\quad \underset { \overrightarrow { Drey\quad Ether }  }{ Na } \quad B,\quad \\ $$

How will  you prepare iodoethane from bromoethane:

Number of $$C$$ atoms which present in vinyl acetylene is  

An alkane with a molecular weight of 72g upon chlorination gives one monochlorination product. The alkane is: