Blocking a receiver Question

[Juxone]

If a legal receiver is running down field and is blocked (without first making contact) before a pass isn't this an illegal block and treated as a holding call, 2) if the ball is in the air does this think become defensiveness pass interference? I ask this after reading the rule 7-5-10 Rule: 7-5-10

It is forward-pass interference if:
a. Any player of A or B who is beyond the neutral zone interferes with an eligible opponent's opportunity to move toward, catch or bat the pass.