Haloalkanes and...

The reaction of toluene with chlorine in the presence of iron and in the absence of light yields:

What will be the product of following reaction

The product in the following reaction is:
$$Ph - Cl + {Fe}/{{Br}_{2}}  \longrightarrow $$ Product

The least reactive chlorine is present in:

Which of the following compound is optically active?

Which of the following compounds will given racemic mixture on nucleophilic substitution by $$O{H}^{\ominus}$$ ion?
(a)  $$C{ H }_{ 3 }-\underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } }  }{ CH } -Br$$
(b)  $$C{ H }_{ 3 }-\overset { \underset { | }{ Br }  }{ \underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } }  }{ C }  } -C{ H }_{ 3 }$$
(c)  $$C{ H }_{ 3 }-\underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } }  }{ CH } -C{ H }_{ 2 }Br$$

Most stable carbocation formed from $${ \left( C{ H }_{ 3 } \right)  }_{ 3 }C-Br,   { \left( { C }_{ 6 }{ H }_{ 5 } \right)  }_{ 3 }CBr,   { \left( { C }_{ 6 }{ H }_{ 5 } \right)  }_{ 2 }CHBr$$ and $${ C }_{ 6 }{ H }_{ 5 }C{ H }_{ 2 }Br$$ would be:

Alkyl halide can be converted into alkene by:

$$S{_N}{1}$$ reaction on optically active substrates mainly gives:

Consider following three halides:
(I)  $$C{H}_{3}-C{H}_{2}-Cl$$  ;
(II)  $$C{H}_{2}=CH-Cl$$  ;
(III)  $${C}_{6}{H}_{5}Cl$$
Arrange $$C-Cl$$ bond length of these compounds in decreasing order.