chemical engineering fertilizer technology MCQs – Page 7

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 Review each marked answer and report any item that may be outdated or unclear.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
121. Nitric acid is produced on commercial scale in a fertiliser plant by___________________?
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A. CaNO3 + H2SO4 reaction

B. Passing air through high voltage electric arc

C. Oxidation of ammonia

D. None of these

122. Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
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A. Sulphuric acid

B. Coke

C. Phosphoric acid

D. Silica and coke
123. Reaction of ______________ acid with phosphate rock produces superphosphates?
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A. Sulphuric

B. Nitric

C. Hydrochloric

D. Phosphoric

124. P2O5 content in superphosphate is about _____________ percent?
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A. 85-90

B. 15-20

C. 65-70

D. 30-35

125. P2O5 content in triple superphosphate is about ______________ percent?
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A. 85-90

B. 15-20

C. 42-50

D. 70-75

126. Plant tranquillisers___________________?
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A. Produce seedless fruit

B. Hold back stem growth and halt plants at a desired height

C. Accelerate ripening of food and grain

D. Cause early maturation of plants

127. During conversion of ammonium carbamate into urea, presence of large excess of water______________?
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A. Adversely affects the yield of urea

B. Does not affect the yield of urea

C. Reduces the evaporator load by diluting the urea solution

D. Increases the yield of urea

128. A phosphatic fertiliser contains 16% P2O5. It could be________________?
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A. None of these

B. Triple superphosphate

C. Superphosphate

D. Dicalcium phosphate

129. Fertiliser produced during soda ash manufacture by dual process is ammonium______________________?
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A. Sulphate

B. None of these

C. Chloride

D. Nitrate

130. Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?
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A. Cryogenic separation of hydrogen from coke oven gas

B. Electrolysis of water

C. Steam reforming of naphtha and cracking of natural gas

D. All A., B. and C.
131. Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ?
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A. Either A. or B.

B. Sulphuric

C. Hydrochloric

D. Neither A. nor B.

132. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process?
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A. Du-ponts

B. Le-chateliers

C. Stengel

D. Habers

133. Reaction of dilute sulphuric acid with phosphate rock produces ____________________?
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A. Phosphoric acid

B. Gypsum

C. Triple superphosphate

D. Superphosphate

134. Pick out the wrong statement?
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A. Dehydration of ammonium carbamate to produce urea is endothermic

B. Phosphate rock when reacted with dilute H2SO4 produces superphosphate

C. ho-phosphoric acid

D. Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of

E. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
135. Pick out the wrong statement?
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A. Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence

B. Application of large excess of Potassic fertiliser in soil increases the valuable carotene in

C. orosis

D. Cereal crops grown on alkaline soil absorb higher amount of fluorides thereby spreading

E. its and vegetables</strong>

F. plant roots penetrate with difficulty

136. Chemical formula of biuret is_________________?
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A. NH2.CO.NH2

B. NH2CONHCONH2

C. NH4COONH2

D. NH3.COO.NH3

137. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?
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A. Nitrogenous fertilisers

B. Phosphatic fertilisers

C. None of these

D. Potassic fertiliser
138. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________?
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A. Phosphoric acid

B. Ammonium phosphate

C. Superphosphate

D. Phosphorous
139. Vetrocoke solution is_________________?
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A. K2SO4

B. A mixture of K2CO3 and As2O3

C. Na2SO4

D. A mixture of Na2CO3 and As2O3

140. H3PO4 is the chemical formula of ______________ phosphoric acid?
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A. None of these

B. Ortho

C. Meta

D. Pyro