Question 11 : Two gas based fertiliser plants are located in
1. Maharashtra and Orissa
2. Gujarat and Madhya Pradesh
3. Maharashtra and Gujarat
4. Jharkhand and Chattisgarh
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Question 12 : During conversion of ammonium carbamate into urea, presence of large excess of water
1. adversely affects the yield of urea.
2. increases the yield of urea.
3. reduces the evaporator load by diluting the urea solution.
4. does not affect the yield of urea.
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Question 13 : Ammonium nitrate (a fertiliser) is coated with limestone powder to
1. add extra nutrient as fertiliser.
2. cut down its production cost.
3. avoid the risk of explosion.
4. increase its nitrogen content.
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Question 14 : Hydrogen content of coke oven gas is __________ percent.
1. 4
2. 58
3. 22
4. 84
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Question 15 : Red phosphorous is changed into white phosphorous by
1. heating in presence of light.
2. vaporisation followed by condensation.
3. none of these.
4. melting under pressure.
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Question 16 : Pick out the wrong statement.
1. A straight fertiliser contains only one nutrient.
2. All the nitrogenous fertilisers are not soluble in water.
3. Calcium cynamide is used as weed killer in onion fields.
4. The phosphorous nutrient makes the plant stem stronger and increases its branches.
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Question 17 : Ammonia synthesis gas is produced from natural gas by
1. steam reforming
2. hydrogenation
3. partial oxidation
4. thermal cracking
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Question 18 : Commercial fertilisers are available mostly in the form of
1. grannules
2. lumps
3. flakes
4. powder
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Question 19 : Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.
1. 800-900
2. 50-80
3. 1000-1200
4. 250-400
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Question 20 : Potassic fertilisers do not promote the development of
1. sugar of fruits & vegetables.
2. stems & leaves during early stage of plant growth.
3. starches of potatoes & grains.
4. fibrous materials of plants.
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