101.
5-10-5 fertilisers mean that they contain

103.
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

105.
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

107.
An increase in the NH3/CO2 ratio in urea manufacture results in

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