I am currently working on Organic chemistry but this page feels off to me, I am pretty sure what steps I am taking are correct but I feel as if I'm making repetitive reactions or guessing incorrectly if it's Sn reactions or E reactions. If someone can double check my work that would be awesome.

4+1xx Sn 2?) DI J) 3OCHH2CrO4 ho reacting heatHCl a. b. ZnClheatHCl heatHI d. c. PyrPOCl3 e. f. H2CrO4 G. h. H2CrO4 H2CrO4 i. j