For tax exemption under Section 80G, donations of an amount in cash within the 80g tax exemption limit of Rs 2000/- are eligible. However, for an amount exceeding Rs. 2000/-, payments in any mode other than cash are eligible for tax deductions. Contributions like food, medicines, and so on are not eligible for tax exemption donations under 80G. Under Section 80G, donations can be claimed as a 50% or 100% deduction, if made to an approved NGO, non-profit, or relief fund. This amount may have a qualifying or maximum limit based on the category under which the donation falls.