Query on Commodity trading w.r.t physical delivery

Commodities
3

Ok.

  1. If i am having a position by NRML order 4 days before expiry, and i don’t squareoff that contract, then what happens at the expiry day?
    Just the cash settlement happens(as in NIFTY FUT trading)?

  2. So, in metals and energy commodities, i can enter a trade any day/time before the expiry, i can hold positions for as many days as i want till expiry day, with no obligations of physical delivery, RIGHT?

  3. What all commodities that i need to be careful regarding the physical delivery (other than GOLD and SILVER family)?