E-PolyLearning

31. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
a. 60
b. 30
c. 95
d. 100
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Answer: (a).60

32. Urea is a __________ fertiliser.
a. nitrogenous
b. potassic
c. phosphatic
d. none of these
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Answer: (a).nitrogenous

33. Calcium ammonium nitrate (CAN) is
a. a mixed fertiliser
b. a straight fertiliser
c. a complex fertiliser
d. not a fertiliser ; it is an explosive
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Answer: (c).a complex fertiliser

34. CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in
a. mono-ethanolamine (MEA)
b. slaked lime
c. ammoniacal liquor
d. Methyl-Ethyl Ketone (MEK)
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Answer: (a).mono-ethanolamine (MEA)

35. Which is the most suitable fertiliser for paddy ?
a. CAN
b. Ammonium sulphate
c. Ammonium nitrate
d. Superphosphate
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Answer: (b).Ammonium sulphate