Can I use silicon spray to lubricate my hybrid cycle chain? Can I use silicon spray to lubricate my hybrid cycle chain? (Of course,  after de-greasing it using a de-greasing spray) 

Thank you for your help
Can you? Yes. It is not optimal for use on chains though. It washes away rather easily leaving your chain unprotected and un-lubricated. It would work in a pinch but a light oil or something specifically made for the application will work much better and last a lot longer. 

Wet or Dry lubes depend on the riding conditions and where you live. WD40 makes a good bicycle chain lube, their bike line, not the generic stuff in a can. Don't use that. RocknRoll, Triflow, ProGold all also makes good lubes.