Haloalkanes and...

On mixing alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloro alkane. The alkane is: 

Which of the following cannot undergo $$E_2$$ reaction?

The correct order of reactivity of the halides,
(I) ethyl chloride; (II) isopropyl chloride and (III) benzyl chloride in $$S_N 1 $$ reaction is:

The major product is:

The product formed in the reaction is:

The treatment of $${R}_{3}MgX$$ with ethyl formate leads to the formation of:

The compound 
$$ C_7 H_8 \xrightarrow { 3Cl_2/\triangle  } X\xrightarrow { Br_2/Fe } Y\xrightarrow { Zn/HCl } Z$$
The compound $$Z$$ is :

During the course of an $$S_N1$$ reaction, the intermediate species formed is:

Arrange the following alkyl chlorides in order of decreasing reactivity in a $$S_N1$$ reaction.
(I) isopropyl bromide 
(II) propyl bromide
(III) tert-butyl bromide
(IV) methyl bromide 

In which of the following can $$C-Cl$$ bond be easily broken?