What is the product formed when chlorine reacts with ethanol?

The following transformation involves a carbocation rearrangement. The carbocation is generated by protonation of the hydroxyl group,followed by the loss of water. Which bond has to migrate in the carbocation to yield the product indicated (after the deprotonation)?

Which of the following will have the highest viscosity?

Methyl alcohol on oxidation with acidified $K_2Cr_2O_7$ gives

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

$A \xrightarrow{KOBr} CHBr_3$
Here $A$ is: