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.
Will I be allowed to trade in NSE Crudeoil Option Contracts on Expiry Day ?
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?