Fertiliser Technology

171.Urea is a better fertilizer than ammonium sulphate, because

1. It is cheaper
2. Nitrogen content is higher
3. It is not poisonous
4. It is easy to manufacture

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172.Urea is formed only

1. In liquid phase
2. In vapour phase
3. At very high temperature
4. At very low pressure (vacuum)

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173.Urea is represented as

1. NH₂.CO.NH₂
2. NH₃CO.CH₃
3. NH.CO₂.NH
4. NH₃.CO₂.NH₃

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174.Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₄&H₂ is high. The presence of promoter along with the catalyst helps in _________ of the catalyst.

1. Stabilisation
2. Increasing the effectiveness
3. Improving the strength&heat resistance
4. All a, b&c

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175.Vapor phase reaction of ammonia&nitric acid to produce ammonium nitrate is termed as the _________ process.

1. Haber's
2. Stengel
3. Le-chatelier's
4. Du-pont's

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176.Vetrocoke solution is

1. A mixture of K2CO3 and As2O3
2. K₂SO₄
3. A mixture of Na2CO3 and As2O3
4. Na₂SO₄

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177.Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?

1. Urea
2. CAN
3. Ammonium sulphate
4. Superphosphate

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178.Which is a catalyst promoter used in catalytic ammonia synthesis reaction?

1. Al₂O₃
2. Cr₂O₃
3. K₂O
4. MnO

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179.Which is the best fertiliser for paddy?

1. Ammonium sulphate
2. Nitro-phosphate
3. Superphosphate
4. Potassium nitrate

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180.Which is the most suitable fertiliser for paddy?

1. CAN
2. Ammonium sulphate
3. Ammonium nitrate
4. Superphosphate

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