Read the following statements and choose the correct answer.                     

i. The boiling points of isomeric haloalkanes decreases with increase in branching

ii. The synthesis of alkyl flourides is best accomplished by swarts reaction

iii.The haloalkanes are more soluble in organic solvents

iv. The decreasing order of density among

${\mathrm{CH}}_2{\mathrm{Cl}}_2,{\mathrm{CHCl}}_3 \text{and }{\mathrm{CCl}}_4 \text{is }{\mathrm{CH}}_2{\mathrm{Cl}}_2>{\mathrm{CHCl}}_3>{\mathrm{CCl}}_4$