Haloalkanes and...

The major product obtained in the following reaction is :

For the compounds  $$CH_3Cl, CH_3Br, CH_3I$$ and $$CH_3F$$, the correct order of increasing C-halogen bond length is:

The major product obtained in the photo catalysed bromination of $$2$$-methylbutane is:

$$3-$$Methyl-pent$$-2-$$ene on reaction with $$HBr$$ in presence of peroxide forms an addition product. 

Which one of the following reagents is not suitable for the elimination reaction?

The major product of the following reaction is :

The increasing order of the reactivity of the following halides for the $$S_{N}1$$ reaction is : 
$$CH_3\underset{Cl}{\underset{|}{C}}HCH_2CH_3$$            $$CH_3CH_2CH_2Cl$$              $$p-H_3CO-C_6H_4-CH_2Cl$$
                (I)                                           (II)                                               (III)

$$1-$$bromo$$-3-$$chlorocyclobutane when treated with two equivalents of $$Na$$, in the presence of ether which of the  following will be formed? 

Among the following, the reaction that proceeds through an electrophilic substitution is:

For the following reactions:
Which of the following statements is correct?