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MCQs 1: Potassic fertilisers__________________?

Are useful during early stage of the plant growth Stimulate early growth and accelerate seeding Help in development of starches of potatoes and grain None of these
Answer Explanation

MCQs 2: Maximum stability of white phosphorous is at__________________?

Very high pressure Atmospheric pressure Room temperature > 600°C
Answer Explanation

MCQs 3: Promoter used in NH3 synthesis catalyst is__________________?

K2O SiO3 V2O5 U2O3
Answer Explanation

MCQs 4: P2O5 content in superphosphate is about _____________ percent?

30-35 15-20 65-70 85-90
Answer Explanation

MCQs 5: Dehydration of ammonium carbamate produces__________________?

Urea Biuret Ammonia water None of these
Answer Explanation

MCQs 6: Calcium ammonium nitrate (CAN) is__________________?

A mixed fertiliser A straight fertiliser A complex fertiliser Not a fertiliser; it is an explosive
Answer Explanation

MCQs 7: NPK means a ______________ fertiliser?

Mixed Potassic Liquid Solid
Answer Explanation

MCQs 8: Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because______________________?

It is hygroscopic and explosive in nature It is highly acidic in nature It is a liquid at room temperature Its nitrogen content is very less
Answer Explanation

MCQs 9: Ammonium sulphate can be produced by reacting gypsum with____________________?

Ammonia Ammonium carbonate Nitric acid None of these
Answer Explanation

MCQs 10: Out of the following, N2 content is minimum in_____________________?

Urea Ammonium nitrate Ammonium sulphate Ammonium chloride
Answer Explanation

MCQs 11: The optimum size of the ammonia plant is ______________ tons/day?

10 100 1000 10000
Answer Explanation

MCQs 12: Phosphoric acid is produced in wet process from phosphate rock and____________________?

Dilute H2SO4 Concentrated H2SO4 Concentrated NHO3 Concentrated HCl
Answer Explanation

MCQs 13: Iron is not used alone as a catalyst in ammonia synthesis, because___________________?

Its activity declines rapidly, if heated to above 520°C It decomposes ammonia It gets oxidised above 500°C None of these
Answer Explanation

MCQs 14: Rock phosphate constitutes mainly of___________________?

Fluorapatite Di-calcium phosphate Mono-calcium phosphate Di-ammonium phosphate
Answer Explanation

MCQs 15: Electric process as compared to wet process (for the manufacture of phosphoric acid) ?

Can use only high grade phosphate rock Is used less frequently Produces a valuable by-product called gypsum Is weak acid process
Answer Explanation

MCQs 16: Fertiliser produced during soda ash manufacture by dual process is ammonium______________________?

Chloride Sulphate Nitrate None of these
Answer Explanation

MCQs 17: Potassic fertiliser is graded based on its ______________ content?

KCl K2O KNO3 K2SO4
Answer Explanation

MCQs 18: Dehydration of ammonium carbamate (to produce urea) is a/an _____________ reaction?

Reversible Catalytic Exothermic Endothermic
Answer Explanation

MCQs 19: The composition of fresh feed to the high temperature, high pressure urea autoclave is______________________?

Excess liquid ammonia and liquefied CO2 Excess liquid ammonia and compressed CO2 gas Liquid ammonia and excess compressed CO2 Compressed ammonia gas and excess compressed CO2
Answer Explanation

MCQs 20: A fertiliser contains 82% N2. It could be_____________________?

Urea Liquid NH3 Ammonium nitrate None of these
Answer Explanation

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