There is a unique maximum quantity limit defined by the exchange (MCX) for each contract. Your order quantity has to be less than the maximum quantity specified by the exchange, otherwise your order will get rejected.
What happens to my open MIS positions in Commodity Options and Futures after 11:15 PM?
Does Kotak Securities allow long option positions to devolve into futures on expiry day if they expire In-the-Money?
Will I be allowed to trade in Commodity Options on expiry day?
What happens to long positions in commodity future contract expiry on the first day of the tender period?