Fertiliser Technology
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?

Calcium nitrate
Urea
Calcium ammonium nitrate (CAN)
Ammonium sulphate

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Fertiliser Technology
Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

Very high pressure is required resulting in costly pressure vessel
Rate of reaction is very low
Space velocity of gas is very low resulting in decreased conversion
None of these

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