During daily Tiruvaradhanam, can we offer small chunks of Jack fruit, Pineapple, etc. instead of the whole fruit? Must only whole areca nut along with betel leaf be offered? Adiyen is offering broke areca nuts.

For daily Tiruvaradhanam, offering ripened Jack fruit, Pineapple, etc. is considered superior. Whole fruits must be bought and only chunks must be separated and offered to Perumal. It is not our practice to buy half-cut fruits and offer them to Perumal.
Only whole areca nuts are offered. Shops sell a type of areca nuts which are whole nuts that are dried without being boiled (Kottaipakku). These are also offered. One must not offer areca nuts that are broken down into small pieces.
Whole areca nuts are available at places such as Kerala. Not sure if this is available in other states.