Q.1
Chemical formula of metaphosphoric acid is
Q.2
Catalyst used in the manufacture of NH₃ by Haber's process is finely divided
Q.3
Base suspension fertiliser essentially contains
Q.4
Nitrogen content of a nitrogenous fertiliser is 35%. It could be
Q.5
Flushing liquor used for cooling coke oven gas constitutes of
Q.6
CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in
Q.7
Urea is a better fertilizer than ammonium sulphate, because
Q.8
Which is the best fertiliser for paddy?
Q.9
Temperature and pressure in ammonia converter is
Q.10
Lower temperature and large excess of ammonia in urea melt
Q.11
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?
Q.12
Optimum reaction temperature in steam reforming of naphtha is __________ °C.
Q.13
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
Q.14
__________ is the undesirable by-product produced in the manufacture of urea.
Q.15
In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process
Q.16
In natural gas, the C/H ratio (by weight) varies in the range of
Q.17
Out of the following, N₂ content is minimum in
Q.18
Catalyst used in ammonia synthesis uses __________ as a promoter.
Q.19
NPK fertiliser is a __________ fertiliser.
Q.20
Raw materials for urea production are
Q.21
__________ is the most suitable fertiliser for paddy.
Q.22
During conversion of ammonium carbamate into urea, presence of large excess of water
Q.23
Reaction of phosphate rock with 98% H₂SO₄ produces
Q.24
Superphosphate is manufactured by reacting phosphate rock with
Q.25
Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
Q.26
Commercial fertilisers are available mostly in the form of
Q.27
Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.
Q.28
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
Q.29
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
Q.30
Which of the following fertilisers is used as a cattle feed?
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