Q1: Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

ANS:A - it is hygroscopic and explosive in nature.

Ammonium nitrate mixed with limestone is not commonly used as a fertilizer for several reasons, but primarily because: It is hygroscopic and explosive in nature. Ammonium nitrate has a high affinity for water and readily absorbs moisture from the air, causing it to clump and become difficult to handle and apply. Moreover, under certain conditions, such as high temperatures or mechanical shock, it can become unstable and may undergo explosive decomposition, posing significant safety risks. The addition of limestone may mitigate these risks to some extent by reducing the sensitivity to detonation, but it does not eliminate the inherent hazards associated with ammonium nitrate. While ammonium nitrate itself is not highly acidic, its decomposition products, such as nitric acid and ammonia, can contribute to soil acidification over time. However, this is not the primary reason why ammonium nitrate mixed with limestone is not used as a fertilizer. It is important to handle and store ammonium nitrate safely to prevent accidents and ensure the security of storage facilities. Proper storage conditions, including temperature control, ventilation, and moisture prevention, are essential to minimize the risk of decomposition and potential explosion. Additionally, regulatory authorities may impose strict regulations on the handling, transportation, and storage of ammonium nitrate to mitigate the associated risks.