Alcohols Phenol...

In which case would a Williamson ether synthesis fail?

Which reaction conditions would be best for the synthesis of isobutyl $$sec$$-butyl ether $$CH_3CH_2CH(CH_3)-O-CH_2CH{(CH_3)}_2$$?

Which yields isopropyl methyl ether as the major product with little or no by products?

The addition of mercuric acetate in the presence of water is called oxymercuration. The adduct obtained gives alcohol on reduction with $$NaBH_4$$ in alkaline medium. This is known as demercuration. Oxymercuration-demercuration allows Markownikoff's addition of H, OH without rearrangement. The net result is the addition of $$H_2O$$. 

Dehydration of the alcohols will be in order:

 $$C(CH_3)_2=C(CH_3)_2\xrightarrow[H_2O]{Cl_2} A\xrightarrow[]{OH^-} B$$

The compound $$A$$ and $$B$$ are :

 In given reaction  A is :

Select schemes A, B, C out of the given below.
I. Acid catalysed hydration  

Primary alcohols can be prepared from alkenes by: