chemical engineering fertilizer technology MCQs – Page 5

Practise multiple-choice questions from chemical engineering fertilizer technology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering fertilizer technology Mcqs
81. H4P2O7 is the chemical formula of _____________ phosphoric acid?
comments icon0
A. Pyro

B. Ortho

C. Meta

D. None of these

82. NPK fertiliser is a _______________ fertiliser?
comments icon0

A. Complex

B. Nitrogenous

C. Mixed

D. Phosphatic

83. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?
comments icon0

A. Potassic fertiliser

B. Nitrogenous fertiliser

C. None of these

D. Phosphatic fertiliser

84. -10-5 fertilisers mean that they contain______________?
comments icon0
A. 5, 10, 5% respectively of N2, P2O5 and K2O

B. Only 5 to 10% active fertiliser constituents

85. Fertiliser plants get their N2 requirements _____________________?
comments icon0

A. From coal gas (coke oven gas)

B. By fractionation of liquefied air

C. By dissociating oxides of nitrogen

D. From producer gas

86. _____________ is required more for leafy crops?
comments icon0

A. Potassium

B. Nitrogen

C. Phosphorous

D. Carbon

87. Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
comments icon0

A. Calcium ammonium nitrate (CAN)

B. Ammonium sulphate

C. Ammonium nitrate

D. Urea

88. Temperature and pressure in urea autoclave is_________________?
comments icon0

A. 120C and 300 atm

B. 400C and 550 atm

C. 200C and 10 atm

D. 190C and 200 atm
89. Phosphatic fertiliser is graded based on its _____________ content?
comments icon0

A. P2O3

B. PCl5

C. H3PO4

D. P2O5
90. In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?
comments icon0
A. High pressure

B. Low pressure

C. Atmospheric pressure; as the pressure has no effect on conversion

D. Very high temperature

91. Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
comments icon0
A. Phosphorous

B. Potassium

C. Nitrogen

D. Calcium

92. C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________?
comments icon0

A. 13

B. 2

C. 6

D. 20

93. Conditioners like finely divided peat are added to the fertiliser to________________?
comments icon0

A. Counteract burning

B. Avoid caking & hardening

C. Produce bulk

D. Increase its solubility

94. A Potassic fertiliser contains 50% K2O. It could be _________________?
comments icon0
A. Potassium sulphate

B. None of these

C. A mixture of NaCl + KCl

D. Potassium chloride

95. Lower temperature and large excess of ammonia in urea melt__________________?
comments icon0

A. Is undesirable

B. Increases biuret formation

C. Does not effect biuret formation

D. Decreases biuret formation
96. Urea is a better fertilizer than ammonium sulphate, because__________________?
comments icon0
A. Nitrogen content is higher

B. It is not poisonous

C. It is cheaper

D. It is easy to manufacture

97. Montecatini process is used for the manufacture of____________________?
comments icon0

A. Phosphoric acid

B. Urea

C. Calcium ammonium nitrate (CAN)

D. Nitric acid

98. A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
comments icon0

A. Salt & coke

B. Sand & coke

C. And sand

D. And coke

99. Electric process as compared to wet process (for the manufacture of phosphoric acid) ?
comments icon0

A. Produces a valuable by-product called gypsum

B. Is weak acid process

C. Can use only high grade phosphate rock

D. Is used less frequently
100. Rock phosphate constitutes mainly of___________________?
comments icon0

A. Di-calcium phosphate

B. Fluorapatite

C. Mono-calcium phosphate

D. Di-ammonium phosphate