Q.1
Rock phosphate used for the production of phosphatic fertiliser is mined at
Q.2
Reaction of calcium fluorapatite with sulphuric acid produces
Q.3
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in
Q.4
Urea is a __________ fertiliser.
Q.5
Hydrogen content of coke oven gas is __________ percent.
Q.6
Vetrocoke solution is
Q.7
Ammonia synthesis gas is produced from fuel oil by
Q.8
Effectiveness of a fertiliser is independent of the
Q.9
Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by
Q.10
__________ catalyst is used in the production of urea from CO₂ and NH₃.
Q.11
Nitrolime is chemically known as
Q.12
Which is the most suitable fertiliser for paddy?
Q.13
The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
Q.14
Naphtha in a fertiliser plant is used as a source of
Q.15
Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.
Q.16
Phosphoric acid is produced in wet process from phosphate rock and
Q.17
Heating of orthophosphoric acid to 250°C produces
Q.18
Pick out the wrong statement.
Q.19
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.
Q.20
Ammonia synthesis gas is produced from natural gas by
Q.21
Nitric acid is produced on commercial scale in a fertiliser plant by
Q.22
Two gas based fertiliser plants are located in
Q.23
Which of the following does not come under the category of 'secondary nutrient' for plant growth?
Q.24
Which of the following does not come under the category of'primary nutrient' for plant growth?
Q.25
Urea is formed only
Q.26
Urea is represented as
Q.27
A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
Q.28
Fertiliser produced during soda ash manufacture by dual process is ammonium
Q.29
__________ is required more for leafy crops.
Q.30
In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.
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