Even packed daals and grains have chemicals and preservatives. How to categorize them? Yellow or green?

Daals (pulses) and grains are categorised in the green list, as they are ingredients themselves.  

It is best to go for organic grocery foods. There are many conscious brands providing organic daals and grains. However, because of cost and availability constraints, organic produce is not always readily accessible. So it is best to choose the best alternatives, from whatever is available to you.