Fertiliser Technology

161.The optimum size of the ammonia plant is _________ tons/day.

1. 10
2. 100
3. 1000
4. 1000

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162.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

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

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163.Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

1. Has a pungent smell
2. Vaporises at normal temperature
3. Is toxic and highly corrosive
4. Is in short supply

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164.Tricresyl phosphate is chemically represented as

1. (CH₃ C₆ H₄)3 PO₄
2. Ca₁₀(PO₄)₃F₆
3. (NH₄)₂HPO₄
4. NH₄H₂PO₄

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165.Triple superphosphate is chemically represented as

1. CaF₂.3Ca₃(PO₄)₂
2. 3Ca₃(PO₄)₂
3. Ca(PO₃)₂
4. Ca(H₂PO₄)₂

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166.Triple superphosphate is made by reacting phosphate rock with _________ acid.

1. Phosphoric
2. Nitric
3. Sulphuric
4. Hydrochloric

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167.Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of _________ percent concentration.

1. 25-28
2. 52-54
3. 75-80
4. > 98

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168.Two gas based fertiliser plants are located in India are:

1. Maharashtra and Gujarat
2. Maharashtra and Orissa
3. Gujarat and Madhya Pradesh
4. Jharkhand and Chhattisgarh

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169.Urea (a nitrogenous fertiliser) is produced from carbon dioxide and

1. Nitric acid
2. Ammonia
3. Ammonium nitrate
4. Nitric oxide

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170.Urea is a _________ fertiliser.

1. Nitrogenous
2. Potassic
3. Phosphatic
4. None of these

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