Question 1 : Lower temperature and large excess of ammonia in urea melt
1. decreases biuret formation
2. increases biuret formation
3. is undersirable
4. does not effect biuret formation
View Answer   Discuss with Members

Question 2 : Ammonium sulphate fertiliser is
1. a basic fertiliser.
2. the highest concentration nitrogenous fertiliser.
3. the best fertiliser for paddy.
4. a neutral fertiliser.
View Answer   Discuss with Members

Question 3 : Superphosphate is manufactured by reacting phosphate rock with
1. aluminium chloride
2. sulphuric acid
3. acetic acid
4. none of these
View Answer   Discuss with Members

Question 4 : Conditioners like finely divided peat are added to the fertiliser to
1. increase its solubility.
2. counteract burning.
3. avoid caking & hardening.
4. produce bulk.
View Answer   Discuss with Members

Question 5 : Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?
1. 15:1
2. 5:1
3. 10:1
4. 5:1
View Answer   Discuss with Members

Question 6 : Calcium ammonium nitrate (CAN) is
1. a mixed fertiliser
2. not a fertiliser ; it is an explosive
3. a straight fertiliser
4. a complex fertiliser
View Answer   Discuss with Members

Question 7 : Which of the following does not come under the category of 'secondary nutrient' for plant growth?
1. Sulphur
2. Magnesium
3. Oxygen
4. Calcium
View Answer   Discuss with Members

Question 8 : The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
1. 60
2. 100
3. 30
4. 90
View Answer   Discuss with Members

Question 9 : Action of phosphoric acid on rock phosphate produces
1. gypsum
2. triple superphosphate
3. superphosphate
4. phosphoric acid
View Answer   Discuss with Members

Question 10 : Urea is a __________ fertiliser.
1. potassic
2. phosphatic
3. none of these
4. nitrogenous
View Answer   Discuss with Members