Ethene reacts with `HOCl` to form

Chloroethene reacts with Y to form NaCl and Z. One mole of Z reacts with two moles of HI to form water and iodo ethene. Which of the following is Y?

Propene reacts with HOCl to give

The predominant product formed when 3- methyl -2- pentene reacts with HOCl is

The predominant product formed when 3- methyl -2- pentene reacts with HOCl is

Sulphur monochloride reacts with ethene to form

Ethene reacts with cold dilute KMnO_(4) to produce