Upvote:3
Yes, you can purchase Euros against your Indian ruppee at the international airport you'll be departing from. All international airports in India have Forex services.
Usually, as far as Government regulations is concerned, there is no minimum amount which you have to exchanged, but that depends on the discretion of the service provider. There is however, a maximum limitation applicable as per Government regulations (in Indian context, Foreign Exchange Management Act, 1999)
Delhi International Airport has two service providers for Forex services - Central Bank of India and Thomas Cook.
Mumbai International Airport has the following service providers in International departure terminal: