Q1: Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

ANS:C - it will evaporate on spraying.

Liquid ammonia is not used as such a fertilizer in tropical countries like India because it will evaporate on spraying. Ammonia (NH3) is a highly effective source of nitrogen for plants, and it can be used as a fertilizer when properly applied to the soil. However, in tropical countries like India, where temperatures are often high, liquid ammonia applied directly to the soil can quickly evaporate upon spraying. This rapid evaporation reduces the efficiency of ammonia as a fertilizer because a significant portion of the ammonia is lost to the atmosphere before it can be absorbed by plant roots. To overcome this issue, alternative forms of nitrogen fertilizers that are more stable and less prone to evaporation, such as urea or ammonium-based fertilizers, are commonly used in tropical agricultural regions like India. These forms of nitrogen fertilizers are more suitable for application in hot and humid climates, as they are less volatile and provide a more reliable source of nitrogen for crop uptake.