Q. Which of the following fertilisers contains the least percentage of nitrogen?

View solution

Q. In the manufacture of H₃PO₄ (ortho), ; strong H₂SO₄ leaching wet process as compared to electric furnace process

View solution

Q. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

View solution

Q. Which of the following fertilisers is used as a cattle feed?

View solution

Q. Biuret formation in urea is kept at minimum (< 1 %), because it is

View solution

Q. Catalyst used in desulphurisation of naphtha is

View solution

Q. Pick out the correct statement.

View solution

Q. 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

View solution

Q. Rock phosphate used for the production of phosphatic fertiliser is mined at

View solution

Q. CaH₄(PO₄)₂ is the chemical formula of

View solution

Q. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

View solution

Q. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

View solution

Q. A phosphatic fertiliser contains 16% P₂O₅. It could be

View solution

Q. __________ is not a fertiliser.

View solution

Q. __________ is the undesirable by-product produced in the manufacture of urea.

View solution

Q. Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

View solution

Q. Which is the best fertiliser for paddy ?

View solution

Q. Main constituent of phosphate rock is

View solution

Q. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition ?

View solution

Q. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

View solution