Chenistry synthesis

1. step 1) add H2SO4 then it becomes propene
2) add HBr then it becomes 2 bromopropane
3) add NaOH then it becomes propan-2-ol

2. step 1) add H2SO4 then it becomes propene
2) add Cl2 then it becomes 1,2-dichloropropane

3. step 1) add H2SO4 then it becomes propene
2) add cold alkaline KMnO4 then it becomes propane-1,2-diol