1. Catalyst used in the manufacture of NH3 by Haber's process is finely divided
2. Red phosphorous is changed into white phosphorous by
3. Urea is represented as
4. Two gas based fertiliser plants are located in
5. Fertiliser plants get their N2 requirements
6. During conversion of ammonium carbamate into urea, presence of large excess of water
7. Hydrogen content of coke oven gas is __________ percent.
8. Ammonium nitrate (a fertiliser) is coated with limestone powder to
9. Action of phosphoric acid on rock phosphate produces
10. Reaction of dilute sulphuric acid with phosphate rock produces
11. Phosphoric acid is produced in wet process from phosphate rock and
12. Base suspension fertiliser essentially contains
13. Conditioners like finely divided peat are added to the fertiliser to
14. Liquid ammonia is not used as such a fertiliser in tropical countries like India, because
15. Which of the following does not come under the category of 'secondary nutrient' for plant growth?
16. 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 ?
17. (CH3 C6 H4)3 PO4 is the chemical formula of
18. Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?
19. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
20. Urea is a __________ fertiliser.
21. Calcium ammonium nitrate (CAN) is
22. CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in
23. Which is the most suitable fertiliser for paddy ?
24. Ammonium sulphate fertiliser is
25. Lower temperature and large excess of ammonia in urea melt